Broadcast receiving system

ABSTRACT

A broadcast receiving apparatus includes: a first receiving unit receiving broadcast data for a first transmission method; a second receiving unit receiving broadcast data for a second transmission method; a first decoding unit decoding the broadcast data received by the first receiving unit; a second decoding unit decoding the broadcast data received by the second receiving unit; a video output unit outputting video, the video being generated based on data decoded by the first or second decoding unit; an operation input unit receiving control information from a remote controller; and a control unit controlling the units based on the control information received by the operation input unit. The remote controller includes a button to output control information for switching between a display state and a non-display state of service, the service being linked with a broadcasting program.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. patent application Ser. No.17/178,814, filed on Feb. 18, 2021, which is a Continuation of U.S.patent application Ser. No. 16/706,103, filed on Dec. 6, 2019, now U.S.Pat. No. 10,965,981, issued on Mar. 30, 2021, which is a Continuation ofU.S. patent application Ser. No. 16/330,290, filed on Mar. 4, 2019, nowU.S. Pat. No. 10,547,892, issued on Jan. 28, 2020, which is a U.S.National Phase under 35 U.S.C. § 371 of International Application No.PCT/JP2017/030113, filed on Aug. 23, 2017, which claims the benefits ofJapanese Application No. 2016-173306, filed on Sep. 6, 2016, JapaneseApplication No. 2016-174552, filed on Sep. 7, 2016, Japanese ApplicationNo. 2016-175245, filed on Sep. 8, 2016, Japanese Application No.2016-176043, filed on Sep. 9, 2016 and Japanese Application No.2016-177214, filed on Sep. 12, 2016, the entire contents of which arehereby incorporated by reference.

TECHNICAL FIELD

The present invention relates to a broadcast receiving system.

BACKGROUND ART

One of extended functions of the digital broadcasting service is databroadcasting in which digital data is transmitted by broadcast waves todisplay various types of information such as weather forecasts, news,and recommended TV programs. Many types of television receivers capableof receiving data broadcasting have already been on the market, and alot of techniques for receiving data broadcasting including thetechnique disclosed in Patent Document 1 listed below have been releasedto the public.

RELATED ART DOCUMENTS Patent Documents

Patent document 1: Japanese Unexamined Patent Application PublicationNo. 2001-186486

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

In association with the recent changes in the contents distributionenvironment, various functional extensions have been demanded for thetelevision receivers. In particular, there are a lot of demands for thedistribution of contents and cooperated applications using a broadbandnetwork environment such as the Internet and demands for the videocontents with higher resolution and higher definition. However, nomatter how the data broadcasting receiving function that the currenttelevision receiver has is utilized or extended, it is difficult toprovide a high-value added television receiver capable of satisfying theabove-mentioned demands.

It is an object of the present invention to provide a broadcastreceiving system capable of executing a function with a higher addedvalue.

Means for Solving the Problem

Techniques described in claims are used as means for solving the problemdescribed above.

One example is a broadcast receiving system including: a broadcastreceiving apparatus configured to receive broadcast data, the broadcastdata being transmitted by a plurality of different transport methods;and a remote controller configured to transmit control information tothe broadcast receiving apparatus to operate the broadcast receivingapparatus is used. The broadcast receiving apparatus includes: a firstreceiving unit configured to receive broadcast data for a firsttransmission method; a second receiving unit configured to receivebroadcast data for a second transmission method; a first decoding unitconfigured to decode the broadcast data received by the first receivingunit; a second decoding unit configured to decode the broadcast datareceived by the second receiving unit; a video output unit configured tooutput video, the video being generated on a basis of data decoded bythe first decoding unit or the second decoding unit; an operation inputunit configured to receive the control information from the remotecontroller; and a control unit configured to control each of the firstreceiving unit, the first decoding unit, the second receiving unit, thesecond decoding unit, and the video output unit on a basis of thecontrol information received by the operation input unit. The remotecontroller includes a button to output control information for switchingbetween a display state and a non-display state of service, the servicebeing linked with a broadcasting program. When the button of the remotecontroller is operated by a user and the operation input unit receivescontrol information from the remote controller, the control unit isconfigured to execute a different display control between a case where aprogram to be displayed as output video of the video output unit is aprogram that is transmitted by the first transmission method andreceived and a case where the program is a program that is transmittedby the second transmission method and received.

Effects of the Invention

By utilizing a technique of the present invention, it is possible toprovide a broadcast receiving system capable of executing a functionwith a higher added value.

BRIEF DESCRIPTIONS OF THE DRAWINGS

FIG. 1 is a configuration diagram of a broadcast communication systemincluding a broadcast receiving apparatus according to a firstembodiment;

FIG. 2A is an explanatory diagram of a component of a coded signal in anMMT;

FIG. 2B is a configuration diagram of an MPU in the MMT;

FIG. 2C is a configuration diagram of an MMTP packet in the MMT;

FIG. 3 is a conceptual diagram of a protocol stack for a broadcastingsystem using the MMT;

FIG. 4 is a layered configuration diagram of control information used ina broadcasting system;

FIG. 5A is a list of tables used for TLV-SI of the broadcasting system;

FIG. 5B is a list of descriptors used for TLV-SI of the broadcastingsystem;

FIG. 6A is a list of messages used for MMT-SI of the broadcastingsystem;

FIG. 6B is a list of tables used for MMT-SI of the broadcasting system;

FIG. 6C is a list (1) of descriptors used for MMT-SI of the broadcastingsystem;

FIG. 6D is a list (2) of descriptors used for MMT-SI of the broadcastingsystem;

FIG. 6E is a list (3) of descriptors used for MMT-SI of the broadcastingsystem;

FIG. 7A is a diagram showing a relation between components andrespective tables in the broadcasting system;

FIG. 7B is a diagram showing a data structure of an MPT in thebroadcasting system;

FIG. 7C is a diagram showing a data structure of location information inthe broadcasting system;

FIG. 7D is a diagram showing a data structure of an MPU timestampdescriptor in the broadcasting system;

FIG. 7E is a diagram showing a data structure of an MH-EIT in thebroadcasting system;

FIG. 7F is a diagram showing a data structure of an event packagedescriptor in the broadcasting system;

FIG. 8A is a block diagram of the broadcast receiving apparatusaccording to the first embodiment;

FIG. 8B is a configuration diagram of a logical plane structure of apresentation function of the broadcast receiving apparatus according tothe first embodiment;

FIG. 8C is a software configuration diagram of the broadcast receivingapparatus according to the first embodiment;

FIG. 9 is a block diagram of a broadcast station server according to thefirst embodiment;

FIG. 10 is a block diagram of a service provider server according to thefirst embodiment;

FIG. 11A is a block diagram of a portable information terminal accordingto the first embodiment;

FIG. 11B is a software configuration diagram of the portable informationterminal according to the first embodiment;

FIG. 12A is a system configuration diagram of clocksynchronization/presentation synchronization in the broadcast receivingapparatus according to the first embodiment;

FIG. 12B is a diagram showing a data structure of an NTP format of thebroadcasting system;

FIG. 12C is a diagram showing a data structure of an MH-TOT of thebroadcasting system;

FIG. 12D is a diagram showing a format of a JST_time parameter of thebroadcasting system;

FIG. 12E is a diagram showing a data structure of time information in aTMCC extension information region of the broadcasting system;

FIG. 12F is a diagram showing a method of calculating the current datefrom MJD of the broadcast receiving apparatus according to the firstembodiment;

FIG. 13A is an operation sequence diagram at the time of channelscanning of the broadcast receiving apparatus according to the firstembodiment;

FIG. 13B is a diagram showing a data structure of a TLV-NIT of thebroadcasting system;

FIG. 13C is a diagram showing a data structure of a satellite deliverysystem descriptor of the broadcasting system;

FIG. 13D is a diagram showing a data structure of a service listdescriptor of the broadcasting system;

FIG. 13E is a diagram showing a data structure of an AMT of thebroadcasting system;

FIG. 14A is an operation sequence diagram at the time of channelselection of the broadcast receiving apparatus according to the firstembodiment;

FIG. 14B is a configuration diagram for explaining reference of the MPTin each of packages by a PLT of the broadcasting system;

FIG. 14C is a diagram showing a data structure of a PLT of thebroadcasting system;

FIG. 15A is an appearance diagram of a remote controller by which thebroadcast receiving apparatus according to the first embodiment can becontrolled;

FIG. 15B is a diagram showing a data structure of a remote control keydescriptor of the broadcasting system;

FIG. 16A is an explanatory diagram of a program selecting process of amulti programming channel;

FIG. 16B is an explanatory diagram of an angle selecting process for amultiview compliant program;

FIG. 17A is a diagram showing a data structure of an LCT of thebroadcasting system;

FIG. 17B is a diagram showing a data structure of an MPU presentationregion specifying descriptor of the broadcasting system;

FIG. 17C is a diagram showing layout assignment to a layout number basedon the LCT;

FIG. 17D is a diagram showing layout assignment to a layout number basedon the LCT;

FIG. 17E is a diagram showing layout assignment to a layout number basedon the LCT;

FIG. 17F is a diagram showing layout assignment to a layout number basedon the LCT;

FIG. 18A is an explanatory diagram of an exceptional process of screenlayout control based on the LCT;

FIG. 18B is an explanatory diagram of an exceptional process of screenlayout control based on the LCT;

FIG. 19A is a diagram showing a data structure of a video componentdescriptor of the broadcasting system;

FIG. 19B is an explanatory diagram of meanings of video signal aspectratios of the video component descriptor;

FIG. 19C is an explanatory diagram of an aspect ratio converting processof the broadcast receiving apparatus according to the first embodiment;

FIG. 19D is an explanatory diagram of an aspect ratio converting processof the broadcast receiving apparatus according to the first embodiment;

FIG. 20A is a screen display diagram of an EPG screen of the broadcastreceiving apparatus according to the first embodiment;

FIG. 20B is a screen display diagram of an EPG screen of the broadcastreceiving apparatus according to the first embodiment;

FIG. 20C is a screen display diagram of an EPG screen of the broadcastreceiving apparatus according to the first embodiment;

FIG. 21 is a screen display diagram at the time of displaying anemergency warning broadcasting message of the broadcast receivingapparatus according to the first embodiment;

FIG. 22A is a diagram showing a data structure of a contents copycontrol descriptor of the broadcasting system;

FIG. 22B is a diagram showing meanings of copy control information forthe contents copy control descriptors;

FIG. 23 is a diagram showing a data structure of a contents usagecontrol descriptor of the broadcasting system;

FIG. 24 is a block diagram of a broadcast receiving apparatus accordingto a second embodiment;

FIG. 25 is an explanatory diagram of inconsistent display of currenttime at the time of switching broadcasting services;

FIG. 26A is an explanatory diagram of an operation of selection controlof a reference source of current time information according to thesecond embodiment;

FIG. 26B is an operation sequence diagram of an updating process ofcurrent time information according to the second embodiment;

FIG. 27A is a screen display diagram of an EPG screen of the broadcastreceiving apparatus according to the second embodiment;

FIG. 27B is a screen display diagram of an EPG screen of the broadcastreceiving apparatus according to the second embodiment;

FIG. 28 is an appearance diagram of a remote controller that can controla broadcast receiving apparatus according to a third embodiment;

FIG. 29 is an explanatory diagram of an outline of an operation when anMM key of the broadcast receiving apparatus according to the thirdembodiment is pressed;

FIG. 30 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 31 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 32 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 33 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 34 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 35 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 36 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 37 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 38 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 39 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 40A is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 40B is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 41 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 42 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 43 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 44 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 45 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 46 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 47 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 48 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 49 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 50A is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 50B is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 51 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 52 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 53 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed;

FIG. 54 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed; and

FIG. 55 is an explanatory diagram of the operation when the MM key ofthe broadcast receiving apparatus is pressed.

DETAILED DESCRIPTION OF EMBODIMENTS

Hereinafter, embodiments of the present invention will be described withreference to the drawings.

First Embodiment

[System Configuration]

FIG. 1 is a system configuration diagram showing an example of abroadcast communication system including a broadcast receiving apparatusaccording to the present embodiment. The broadcast communication systemof the present embodiment includes a broadcast receiving apparatus 100,an antenna 100 a, a broadband network such as the Internet 200, a routerdevice 200 r, an access point 200 a, a radio tower 300 t and a broadcastsatellite (or communication satellite) 300 s of a broadcast station, abroadcast station server 300, a service provider server 400, an otherapplication server 500, a mobile phone communication server 600, a basestation 600 b of a mobile phone communication network, and a portableinformation terminal 700.

The broadcast receiving apparatus 100 receives broadcast wavestransmitted from the radio tower 300 t via the broadcast satellite (orcommunication satellite) 300 s and the antenna 100 a. Alternatively, thebroadcast receiving apparatus 100 may receive broadcast wavestransmitted from the radio tower 300 t directly from the antenna 100 awithout passing through the broadcast satellite (or communicationsatellite) 300 s. In addition, the broadcast receiving apparatus 100 canbe connected to the Internet 200 via the router device 200 r, and thuscan perform data transmission and reception through the communicationwith server devices and other communication equipment on the Internet200.

The router device 200 r is connected to the Internet 200 through wiredcommunication, to the broadcast receiving apparatus 100 through wired orwireless communication, and to the portable information terminal 700through wireless communication. The wireless communication may beestablished by Wi-Fi (registered trademark) or the like. This allows theserver devices and other communication equipment on the Internet 200,the broadcast receiving apparatus 100, and the portable informationterminal 700 to perform data transmission and reception between oneanother via the router device 200 r. Note that the communication betweenthe broadcast receiving apparatus 100 and the portable informationterminal 700 may be performed as direct communication by BlueTooth(registered trademark), NFC (Near Field Communication) or the likewithout passing through the rooter 200 r.

The radio tower 300 t is a broadcasting facility of the broadcaststation and transmits broadcast waves including coded data ofbroadcasting programs, subtitle information, other applications,general-purpose data, and the like. The broadcast satellite (orcommunication satellite) 300 s is a relay device that receives broadcastwaves transmitted from the radio tower 300 t of the broadcast station,performs frequency conversion and the like as appropriate, and thentransmits the radio waves to the antenna 100 a connected to thebroadcast receiving apparatus 100. In addition, the broadcast stationhas the broadcast station server 300. The broadcast station server 300can store metadata such as broadcasting programs (video contents, etc.)and the titles, IDs, summaries, casts, broadcasting dates and the likeof the broadcasting programs, and provide the video contents andmetadata to a service provider based on a contract. Note that the videocontents and metadata may be provided to the service provider through anAPI (Application Programming Interface) in the broadcast station server300.

The service provider server 400 is a server device prepared by theservice provider, and can provide various services cooperated withbroadcasting programs distributed from the broadcast station.

In addition, the service provider server 400 stores, manages, anddistributes video contents and metadata delivered from the broadcaststation server 300 and various contents, applications and the likecooperated with the broadcasting programs. In addition, the serviceprovider server 400 further has a function of searching for deliverablecontents, applications and the like and presenting a list of them inresponse to an inquiry from the television receiver and the like. Notethat the storage, management, and distribution of the contents andmetadata and those of the applications may be performed by differentserver devices. The broadcast station and the service provider may bethe same or different from each other. A plurality of service providerservers 400 may be prepared for different services. In addition, thebroadcast station server 300 may be provided with the functions of theservice provider server 400.

The other application server 500 is a publicly known server device thatstores, manages, and distributes other general applications, operatingprograms, contents, data, and the like. A plurality of other applicationservers 500 may be provided on the Internet 200.

The mobile phone communication server 600 is connected to the Internet200 and is further connected to the portable information terminal 700via the base station 600 b. The mobile phone communication server 600manages telephone communication (telephone call) and data transmissionand reception performed by the portable information terminal 700 throughthe mobile phone communication network, and allows the portableinformation terminal 700 to perform data transmission and receptionthrough the communication with server devices and other communicationequipment on the Internet 200. The communication between the basestation 600 b and the portable information terminal 700 may be performedby W-CDMA (Wideband Code Division Multiple Access: registeredtrademark), GSM (Global System for Mobile Communications: registeredtrademark), LTE (Long Term Evolution), or other communication methods.

The portable information terminal 700 has a function of telephonecommunication (telephone call) and data transmission and receptionthrough the mobile phone communication network and a function ofwireless communication through Wi-Fi (registered trademark) or the like.The portable information terminal 700 can be connected to the Internet200 via the router device 200 r or the access point 200 a or via thebase station 600 b and the mobile phone communication server 600 on themobile phone communication network, and thus can perform datatransmission and reception through the communication with server devicesand other communication equipment on the Internet 200. The access point200 a is connected to the internet 200 through wired communication andis further connected to the portable information terminal 700 throughwireless communication. The wireless communication may be established byWi-Fi (registered trademark) or the like. Note that the communicationbetween the portable information terminal 700 and the broadcastreceiving apparatus 100 may be performed via the access point 200 a, theInternet 200, and the router device 200 r or via the base station 600 b,the mobile phone communication server 600, the Internet 200, and therouter device 200 r.

[Outline of MMT Method]

The broadcast receiving apparatus 100 shown in FIG. 1 is a televisionreceiver that supports MMT (MPEG Media Transport) as a media transportmethod for transmitting video and audio data, in place of TS (TransportStream) defined in the MPEG (Moving Picture Experts Group)-2 system(hereinafter, “MPEG2-TS”) mainly adopted by conventional digitalbroadcasting systems. The broadcast receiving apparatus 100 may be atelevision receiver supporting both MPEG2-TS and MMT.

MPEG2-TS has a characteristic of multiplexing video and audio componentsand the like making up a program, in a single stream together withcontrol signals and clocks. Since the components are treated as singlestream with the inclusion of clocks, MPEG2-TS is suitable for thetransmission of single contents through a single transmission path withan ensured transmission quality, and thus has been adopted by manyconventional digital broadcasting systems. On the other hand, because ofthe functional limitations of MPEG2-TS for the recent changes in thecontents distribution environment including the diversification ofcontents, diversification of equipment using contents, diversificationof transmission paths through which contents are distributed, anddiversification of contents accumulation environment, MMT has beenestablished as a new media transport method.

FIG. 2A shows one example of an outline of a coded signal in MMT of thepresent embodiment. As shown in FIG. 2A, MMT of the present embodimenthas an MFU (Media Fragment Unit), an MPU (Media Processing Unit), anMMTP (MMT Protocol) payload, and an MMTP packet as elements making upthe coded signal.

The MFU is a format at the time of transmitting video, audio, and thelike, and may be configured in units of NAL (Network Abstraction Layer)unit or access unit. The MPU includes one or more access unit, and theMPU can execute a decoding process of video and/or audio by a singlebody. The MPU may be configured of MPU metadata including informationrelated to the overall configuration of the MPU, movie fragment metadataincluding information of coded media data, and sample data that is codedmedia data. Plural sets of movie fragment data and sample data may existin one MPU. Further, the MFU can be extracted from the sample data. FIG.2B shows one example of a configuration of the MPU. By adding a sequencenumber to each MPU belonging to the same asset, an arbitrary MPU can bedistinguished from other MPUs on the basis of an asset ID foridentifying an asset and the sequence number of the MPU. Further, in thecase of media such as video components and audio components,presentation time and decoding time may be specified in units of MPU oraccess unit.

The MMTP packet is configured of a header and an MMTP payload, andtransmits control information of the MFU and MMT. The MMTP payload has apayload header corresponding to contents (data unit) stored in a payloadsection. FIG. 2C shows one example of an outline of a process of makingthe MFU from video and audio signals, storing the MFU in the MMTPpayload, and then creating the MMTP packet. In the case of a videosignal that is coded using inter-frame prediction, the MPU is desirablyconfigured in units of GOP (Group of Pictures). In addition, when thesize of MFU to be transmitted is small, a single MFU may be stored in asingle payload section, or a plurality of MFUs of the same kind may bestored in a single payload section. In addition, when the size of MFU tobe transmitted is large, a single MFU may be divided and then stored ina plurality of payload sections. In order to recover a packet loss on atransmission path, the MMTP packet may be protected by such techniquesas AL-FEC (Application Layer Forward Error Correction) and ARQ(Automatic Repeat Request).

The broadcasting system of the present embodiment uses MPEG-H HEVC (HighEfficiency Video Coding) as a video coding method, and uses MPEG-4 AAC(Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless Coding) as anaudio coding method. Coded data of video, audio, and the like ofbroadcasting programs that are coded by the methods described above isformatted into MFU or MPU, stored in an MMTP payload, encapsulated in anMMTP packet, and then transmitted in the form of an IP (InternetProtocol) packet. In addition, data contents related to broadcastingprograms may also be formatted into MFU or MPU, stored in an MMTPpayload, encapsulated in an MMTP packet, and then transmitted in theform of an IP packet. Four types of data contents transmission methodsare prepared, which include: (1) a subtitle/caption transmission methodused for data steaming synchronous with broadcasting; (2) an applicationtransmission method used for data transmission service asynchronous withbroadcasting; (3) an event message transmission method used forsynchronous/asynchronous message notification to applications operatingon the television receiver from a broadcast station; and (4) ageneral-purpose data transmission method for synchronous/asynchronoustransmission of other general-purpose data.

In the transmission of MMTP packets, UDP/IP (User DatagramProtocol/Internet Protocol) is used for the broadcast transmission path,and UDP/IP or TCP/IP (Transmission Control Protocol/Internet Protocol)is used for the communication line. Further, TLV (Type Length Value)multiplexing is used in the broadcast transmission path for efficienttransmission of IP packets. Examples of protocol stack for thebroadcasting system of the present embodiment are shown in FIG. 3. InFIG. 3, (A) shows one example of a protocol stack for the broadcasttransmission path, and (B) shows one example of a protocol stack for thecommunication line.

The broadcasting system of the present embodiment provides a scheme fortransmitting two types of control information, that is, MMT-SI(MMT-Signaling Information) and TLV-SI (TLV-Signaling Information).MMT-SI is control information indicating the configuration of abroadcasting program and the like. This control information is formattedinto an MMT control message, stored in an MMTP payload, encapsulated inan MMTP packet, and then transmitted in the form of an IP packet. TLV-SIis control information related to IP packet multiplexing, and providesinformation for channel selection and correspondence information of IPaddresses and services.

Further, even the broadcasting system using the MMT transmits timeinformation in order to provide an absolute time. Note that componentpresentation time is indicated for each TS based on different clocks inthe MPEG2-TS, while component presentation time is indicated based onthe coordinated universal time (UTC) in the MMT. This scheme allows aterminal device to display components transmitted from differenttransmission points through different transmission paths insynchronization. IP packets conforming to an NTP (Network Time Protocol)are used for providing the UTC.

[Control Information of Broadcasting System Using MMT]

As described above, in the broadcasting system compatible with thebroadcast receiving apparatus 100 of the present embodiment, TLV-SIrelated to a TLV multiplexing method for multiplexing IP packets andMMT-SI related to MMT which is a media transport method are prepared asthe control information. TLV-SI provides information with which thebroadcast receiving apparatus 100 demultiplexes IP packets multiplexedin the broadcast transmission path. TLV-SI is composed of a “table” anda “descriptor”. The “table” is transmitted in a section format, and the“descriptor” is placed in the “table”. MMT-SI is transmission controlinformation indicating the information related to configuration of anMMT package and broadcasting services. MMT-SI has a three-layerstructure composed of a “message” layer storing “table” and“descriptor”, a “table” layer having an element and property thatindicate specific information, and a “descriptor” layer indicating moredetailed information. An example of the layer structure of the controlinformation used in the broadcasting system of the present embodiment isshown in FIG. 4.

<Tables Used for TLV-SI>

FIG. 5A shows a list of “tables” used for TLV-SI of the broadcastingsystem compatible with the broadcast receiving apparatus 100 of thepresent embodiment. In the present embodiment, the following tables areused as “tables” of TLV-SI.

(1) TLV-NIT

A network information table for TLV (TLV-NIT) provides informationrelated to the physical configuration of a TLV stream transmittedthrough a network and indicates the characteristics of the network.

(2) AMT

An address map table (AMT) provides a list of multicast groups of IPpackets making up respective services transmitted through the network.

(3) Table Set by Provider

Other tables set uniquely by the service provider and the like may beprepared.

<Descriptors Used for TLV-SI>

FIG. 5B shows a list of “descriptors” included in TLV-SI of thebroadcasting system compatible with the broadcast receiving apparatus100 of the present embodiment. In the present embodiment, the followingdescriptors are used as “descriptors” of TLV-SI.

(1) Service List Descriptor

A service list descriptor provides a list of services classified byservice identifications and service types.

(2) Satellite Delivery System Descriptor

A satellite delivery system descriptor indicates physical conditions fora satellite transmission path.

(3) System Management Descriptor

A system management descriptor is used to distinguish broadcasting fromnon-broadcasting.

(4) Network Name Descriptor

A network name descriptor describes a network name with character codes.

(5) Remote Control Key Descriptor

A remote control key descriptor is used to set a service that isassigned to a one-touch selecting button of a remote controller for areceiver.

(6) Descriptor Set by Provider

Other descriptors set uniquely by the service provider and the like maybe prepared.

<Messages Used for MMT-SI>

FIG. 6A shows a list of “messages” used for MMT-SI of the broadcastingsystem compatible with the broadcast receiving apparatus 100 of thepresent embodiment. In the present embodiment, the following messagesare used as “messages” of MMT-SI.

(1) PA Message

A package access (PA) message is used to transmit various tables.

(2) M2 Section Message

An M2 section message is used to transmit section extension format ofthe MPEG-2 Systems.

(3) CA Message

A CA message is used to transmit a table for identifying a conditionalaccess method.

(4) M2 Short Section Message

An M2 short section message is used to transmit section short format ofthe MPEG-2 Systems.

(5) Data Transmission Message

A data transmission message is a message storing a table related to datatransmission.

(6) Message Set by Provider

Other messages set uniquely by the service provider and the like may beprepared.

<Tables Used for MMT-SI>

FIG. 6B shows a list of “tables” used for MMT-SI of the broadcastingsystem compatible with the broadcast receiving apparatus 100 of thepresent embodiment. A table is control information having an element andproperty that indicate specific information. A table is stored in amessage and is encapsulated in an MMTP packet to be transmitted. Notethat a message that stores a table may be determined in accordance withthe type of the table. In the present embodiment, the following tablesare used as “tables” of MMT-SI.

(1) MPT

An MMT package table (MPT) provides package configuration informationsuch as a list of assets and locations of assets on the network. An MPTmay be stored in a PA message.

(2) PLT

A package list table (PLT) presents a list of IP data flows fortransmitting PA messages of MMT packages provided as a broadcastingservice, packet IDs, and IP data flows for transmitting IP services. APLT may be stored in a PA message.

(3) LCT

A layout configuration table (LCT) is used to correlate layoutinformation for presentation with layout numbers. An LCT may be storedin a PA message.

(4) ECM

An entertainment control message (ECM) is common information made up ofprogram information and control information, and delivers keyinformation for descrambling and others. An ECM may be stored in an M2section message.

(5) EMM

An entitlement management message (EMM) is used to transmit personalinformation including contract information for individual subscribersand key information for decoding ECM (common information). An EMM may bestored in an M2 section message.

(6) CAT (MH)

A conditional access table (CA table (CAT)) (MH) is used to store adescriptor for identifying a conditional access method. A CAT (MH) maybe stored in a CA message.

(7) DCM

A download control message (DCM) transmits key-related informationincluding a key for decoding a transmission path code for downloading. ADCM may be stored in an M2 section message.

(8) DMM

A download management message (DMM) transmits key-related informationincluding a download key for decoding an encoded DCM. A DMM may bestored in an M2 section message.

(9) MH-EIT

An MH-event information table (MH-EIT) is time-series informationrelated to events included in each service. An MH-EIT may be stored inan M2 section message.

(10) MH-AIT

An MH-application information table (MH-AIT) stores all the informationrelated to applications and startup conditions required forapplications. An MH-AIT may be stored in an M2 section message.

(11) MH-BIT

An MH-broadcaster information table (MH-BIT) is used to provideinformation of broadcasters present on the network. An MH-BIT may bestored in an M2 section message.

(12) MH-SDTT

An MH-software download trigger table (MH-SDTT) is used to providedownload announcement information. An MH-SDTT may be stored in an M2section message.

(13) MH-SDT

An MH-service description table (MH-SDT) has a suitable indicating aservice included in a specific TLV stream and transmits informationrelated to a sub-channel such as a name of sub-channel and a name of abroadcaster. An MH-SDT may be stored in an M2 section message.

(14) MH-TOT

An MH-time offset table (MH-TOT) transmits JST time and date (ModifiedJulian Date) information. An MH-TOT may be stored in an M2 short sectionmessage.

(15) MH-CDT

An MH-common data table (MH-CDT) is used to transmit common data, whichshould be stored in a non-volatile memory, in a section format to allreceivers that receive the MH-CDT. An MH-CDT may be stored in an M2section message.

(16) DDM Table

A data directory management (DDM) table provides a directoryconfiguration of files making up an application in order to separate afile configuration of the application from a configuration for filetransmission. A DDM table may be stored in a data transmission message.

(17) DAM Table

A data asset management (DAM) table provides a configuration of MPU inan asset and version information of each MPU. A DAM table may be storedin a data transmission message.

(18) DCC Table

A data content configuration (DCC) table provides configurationinformation of files as data contents in order to achieve flexible andeffective cache control. A DCC table may be stored in a datatransmission message.

(19) EMT

An event message table (EMT) is used to transmit information related toan event message. An EMT may be stored in an M2 section message.

(20) Table Set by Provider

Other tables set uniquely by the service provider and the like may beprovided.

<Descriptors Used for MMT-SI>

FIG. 6C, FIG. 6D and FIG. 6E show lists of “descriptors” included inMMT-SI of the broadcasting system compatible with the broadcastreceiving apparatus 100 of the present embodiment. A descriptor iscontrol information that provides more detailed information, and isincluded in a table. Note that a table in which a descriptor is includedmay be determined in accordance with the type of the descriptor. In thepresent embodiment, the following descriptors are used as “descriptors”of MMT-SI.

(1) Asset Group Descriptor

An asset group descriptor provides a relation of an asset group and apriority in the group. An asset group descriptor may be included in theMPT.

(2) Event Package Descriptor

An event package descriptor provides a correlation between an event,which represents a program, and a package. An event package descriptormay be included in MH-EIT stored in an M2 section message to betransmitted.

(3) Background Color Specifying Descriptor

A background color specifying descriptor provides a background color ofa rearmost plane in layout specification. A background color specifyingdescriptor may be included in LCT.

(4) MPU Presentation Region Specifying Descriptor

An MPU presentation region specifying descriptor provides a location ofpresentation of MPU. An MPU presentation region specifying descriptormay be included in the MPT.

(5) MPU Timestamp Descriptor

An MPU timestamp descriptor indicates the time of presentation of thefirst access unit in the presentation order in the MPU. An MPU timestampdescriptor may be included in the MPT.

(6) Dependency Relation Descriptor

A dependency relation descriptor provides asset IDs for assets dependenton each other. A dependency relation descriptor may be included in theMPT.

(7) Access Control Descriptor

An access control descriptor provides information for identifying theconditional access method. An access control descriptor may be includedin the MPT or CAT (MH).

(8) Scramble Method Descriptor

A scramble method descriptor provides information for identifying atarget to be encoded at the time of scrambling and a type of an encodingalgorithm. A scramble method descriptor may be included in the MPT orCAT (MH).

(9) Message Authentication Method Descriptor

A message authentication method descriptor provides information foridentifying a message authentication method when message authenticationis performed. A message authentication method descriptor may be includedin the MPT or CAT (MH).

(10) Emergency Information Descriptor (MH)

An emergency information descriptor (MH) is used when emergency warningbroadcasting is performed. An emergency information descriptor (MH) maybe included in the MPT.

(11) MH-MPEG-4 Audio Descriptor

An MH-MPEG-4 audio descriptor is used to describe basic information forspecifying coding parameters of an audio stream defined in ISO/IEC14496-3 (MPEG-4 audio). An MH-MPEG-4 audio descriptor may be included inthe MPT.

(12) MH-MPEG-4 Audio Extension Descriptor

An MH-MPEG-4 audio extension descriptor is used to describe a profile,level, and specific setting to a coding method of an MPEG-4 audiostream. An MH-MPEG-4 audio extension descriptor may be included in theMPT.

(13) MH-HEVC Video Descriptor

An MH-HEVC video descriptor is used to describe basic coding parametersfor a video stream (HEVC stream) defined in ITU-T Recommendation H.265and ISO/IEC 23008-2. An MH-HEVC video descriptor may be included in theMPT.

(14) MH-Link Descriptor

An MH-link descriptor identifies a service that is provided when aviewer demands additional information related to a specific matterdescribed in a program arrangement information system. An MH-linkdescriptor may be included in the MPT, MH-EIT, MH-SDT, and the like.

(15) MH-Event Group Descriptor

An MH-event group descriptor is used to indicate that a plurality ofevents form a group when these events are related to one another. AnMH-event group descriptor may be included in MH-EIT.

(16) MH-Service List Descriptor

An MH-service list descriptor provides a list of services classified byservice identifications and service types. An MH-service list descriptormay be included in MH-BIT.

(17) MH-Short Format Event Descriptor

An MH-short format event descriptor represents an event name and a shortdescription of the event in a text format. An MH-short format eventdescriptor may be included in MH-EIT.

(18) MH-Extension Format Event Descriptor

An MH-extension format event descriptor is added to an MH-short formatevent descriptor, and provides a detailed description of an event. AnMH-extension format event descriptor may be included in MH-EIT.

(19) Video Component Descriptor

A video component descriptor provides parameters and description for avideo component, and is used also for expressing an elementary stream ina text format. A video component descriptor may be included in the MPTor MH-EIT.

(20) MH-Stream Identifying Descriptor

An MH-stream identifying descriptor is used to attach a label to acomponent stream for a service so that descriptive contents indicated bya video component descriptor in MH-EIT can be referred to with thelabel. An MH-stream identifying descriptor may be included in the MPT.

(21) MH-Content Descriptor

An MH-content descriptor indicates the genre of an event. An MH-contentdescriptor may be included in MH-EIT.

(22) MH-Parental Rate Descriptor

An MH-parental rate descriptor indicates age-based viewing restriction,and is used to extend the range of restriction based on otherrestriction conditions. An MH-parental rate descriptor may be includedin the MPT or MH-EIT.

(23) MH-Audio Component Descriptor

An MH-audio component descriptor provides parameters for an audioelementary stream, and is used also for expressing the elementary streamin a text format. An MH-audio component descriptor may be included inthe MPT or MH-EIT.

(24) MH-Target Area Descriptor

An MH-target area descriptor is used to describe a target area of aprogram or some streams making up the program. An MH-target areadescriptor may be included in the MPT.

(25) MH-Series Descriptor

An MH-series descriptor is used to identify a series program. AnMH-series descriptor may be included in MH-EIT.

(26) MH-SI Transmission Parameter Descriptor

An MH-SI transmission parameter descriptor is used to indicate SItransmission parameters. An MH-SI transmission parameter descriptor maybe included in MH-BIT.

(27) MH-Broadcaster Name Descriptor

An MH-broadcaster name descriptor describes a name of a broadcaster. AnMH-broadcaster name descriptor may be included in MH-BIT.

(28) MH-Service Descriptor

An MH-service descriptor expresses a name of a sub-channel and a name ofa provider of the sub-channel in character code together with a servicetype. An MH-service descriptor may be included in MH-SDT.

(29) IP Data Flow Descriptor

An IP data flow descriptor provides information of IP data flow makingup a service. An IP data flow descriptor may be included in MH-SDT.

(30) MH-CA Startup Descriptor

An MH-CA startup descriptor describes startup information for starting aCAS program on a CAS board. An MH-CA startup descriptor may be includedin the MPT or CAT (CA).

(31) MH-Type Descriptor

An MH-Type descriptor indicates a type of a file transmitted by anapplication transmission method. An MH-Type descriptor may be includedin a DAM table.

(32) MH-Info Descriptor

An MH-Info descriptor describes information related to MPU or an item.An MH-Info descriptor may be included in a DAM table.

(33) MH-Expire Descriptor

An MH-Expire descriptor describes an expiration date of an item. AnMH-Expire descriptor may be included in a DAM table.

(34) MH-Compression Type Descriptor

An MH-Compression Type descriptor states that an item to be transmittedis compressed, and indicates a compression algorithm for the compressionand the number of bytes of the item before the compression. AnMH-Compression Type descriptor may be included in a DAM table.

(35) MH-Data Coding Method Descriptor

An MH-data coding method descriptor is used to identify a data codingmethod. An MH-data coding method descriptor may be included in the MPT.

(36) UTC-NPT Reference Descriptor

A UTC-NPT reference descriptor is used to transmit a relation betweenNPT (Normal Play Time) and UTC. A UTC-NPT reference descriptor may beincluded in EMT.

(37) Event Message Descriptor

An event message descriptor transmits information generally related toevent messages. An event message descriptor may be included in EMT.

(38) MH-Local Time Offset Descriptor

An MH-local time offset descriptor is used to provide a given offsetvalue to actual time (e.g., UTC+9 hours) and display time to a humansystem when a daylight saving time system is implemented. An MH-localtime offset descriptor may be included in an MH-TOT.

(39) MH-Component Group Descriptor

An MH-component group descriptor defines and identifies a combination ofcomponents in an event. An MH-component group descriptor may be includedin MH-EIT.

(40) MH-Logo Transmission Descriptor

An MH-logo transmission descriptor is used to describe pointing to acharacter string for a simplified logo and a logo in a CDT format. AnMH-logo transmission descriptor may be included in MH-SDT.

(41) MPU Extension Timestamp Descriptor

An MPU extension timestamp descriptor provides a time to decode anaccess unit in MPU. An MPU extension timestamp descriptor may beincluded in the MPT.

(42) MPU Download Contents Descriptor

An MPU download contents descriptor is used to describe propertyinformation of contents that are downloaded using MPU. An MPU downloadcontents descriptor may be included in MH-SDTT.

(43) MH-Network Download Contents Descriptor

An MH-network download contents descriptor is used to describe propertyinformation of contents that are downloaded through the network. AnMH-network download contents descriptor may be included in MH-SDTT.

(44) MH-Application Descriptor

An MH-application descriptor describes information of an application. AnMH-application descriptor may be included in an MH-AIT.

(45) MH-Transmission Protocol Descriptor

An MH-transmission protocol descriptor is used to specify a transmissionprotocol for broadcasting, communication, and the like, and to providelocation information of an application depending on the transmissionprotocol. An MH-transmission protocol descriptor may be included in theMH-AIT.

(46) MH-Simplified Application Location Descriptor

An MH-simplified application location descriptor provides the detaileddescription of an acquisition destination of an application. AnMH-simplified application location descriptor may be included in theMH-AIT.

(47) MH-Application Boundary Authority Setting Descriptor

An MH-application boundary authority setting descriptor provides adescription for setting an application boundary and setting an authorityfor access to broadcasting resources for each region (URL). AnMH-application boundary authority setting descriptor may be included inthe MH-AIT.

(48) MH-Startup Priority Information Descriptor

An MH-startup priority information descriptor provides a description forspecifying a startup priority of an application. An MH-startup priorityinformation descriptor may be included in the MH-AIT.

(49) MH-Cache Information Descriptor

An MH-cache information descriptor provides a description used for cachecontrol in a case where resources making up an application are saved ina cache when reuse of the application is assumed. An MH-cacheinformation descriptor may be included in the MH-AIT.

(50) MH-Probability-Applied Delay Descriptor

An MH-probability-applied delay descriptor provides a description fordelaying the time of execution of application control by a delay timeset probabilistically, with the expectation that server access loads foracquiring the application are to be dispersed. An MH-probability-applieddelay descriptor may be included in the MH-AIT.

(51) Link Destination PU Descriptor

A link destination PU descriptor describes another presentation unit(PU) to which a presentation unit may possibly make transition. A linkdestination PU descriptor may be included in a DCC table.

(52) Lock Cache Specifying Descriptor

A lock cache specifying descriptor describes a description forspecifying a file to be cached and locked in a presentation unit. A lockcache specifying descriptor may be included in a DCC table.

(53) Unlock Cache Specifying Descriptor

An unlock cache specifying descriptor provides a description forspecifying a file to be unlocked among locked files in a presentationunit. An unlock cache specifying descriptor may be included in a DCCtable.

(54) MH-Download Protection Descriptor

An MH-download protection descriptor describes location information andtransmission information of an MMTP packet to transmit a DCM or a DMM.An MH-download protection descriptor may be included in an MPT or anMH-SDTT.

(55) Application Service Descriptor

An application service descriptor describes entry information and thelike of an application related to service. An application servicedescriptor may be included in an MPT.

(56) MPU Node Descriptor

An MPU node descriptor indicates that the MPU corresponds to a directorynode defined by a data directory management table. An MPU nodedescriptor may be included in a DAM table.

(57) PU Configuration Descriptor

A PU configuration descriptor indicates a list of MPUs making up apresentation unit as mapping information of the presentation unit and atransmission unit. A PU configuration descriptor may be included in aDCC table.

(58) MH-Hierarchical Coding Descriptor

An MH-hierarchical coding descriptor describes information foridentifying a video stream component that is subjected to hierarchicalcoding. An MH-hierarchical coding descriptor may be included in an MPT.

(59) Contents Copy Control Descriptor

A contents copy control descriptor indicates information for controllingcopy generation in a digital recording apparatus with respect to thewhole service, and is used by a broadcast station (a copyright ownerside) to transmit information regarding copy or the maximum transmissionrate to the digital recording apparatus in a case where it is supposedto execute digital recording. A contents copy control descriptor may beincluded in an MPT, an MH-EIT, an MH-SDT, or the like.

(60) Contents Usage Control Descriptor

A contents usage control descriptor is used for indicating informationregarding copy control and remote viewing control in a case where withrespect to a program data thereof are accumulated in a hard disk or thelike or in a case where video/audio signals thereof are output from areceiver. A contents usage control descriptor may be included in an MPT,an MH-EIT, an MH-SDT, or the like.

(61) Descriptor Set by Provider

Other descriptors set uniquely by the service provider and the like maybe prepared.

<Relation Between Data Transmission and Control Information in MMTMethod>

Here, a relation between each of components, such as video and audiotransmitted by a broadcasting system to which the broadcast receivingapparatus 100 according to the present embodiment corresponds, andtypical tables of the MMT-SI will be described with reference to FIG.7A. Note that in an MMT method, each of the components is defined as anasset and in the following, a component may be represented as an asset.

The broadcasting system compatible with the broadcast receivingapparatus 100 of the present embodiment can perform data transmissionthrough a plurality of routes such as TLV streams transmitted throughthe broadcast transmission path and IP data flows transmitted throughthe communication line. A TLV stream includes TLV-SI such as a TLV-NITand an AMT and an IP data flow which is a data flow of IP packets. TheIP data flow includes a video asset including a series of video MPUs andan audio asset including a series of audio MPUs. Similarly, the IP dataflow may include a subtitle asset including a series of subtitle MPUs, acaption asset including a series of caption MPUs, and a data assetincluding a series of data MPUs.

These various assets are associated with “package” by the description ofthe MPT (MMT package table) which is stored in a PA message to betransmitted. Specifically, these assets may be associated with eachother by describing a package ID for identifying a package and an assetID for identifying each asset contained in the package in the MPT. FIG.7B shows one example of a data structure of the MPT. In FIG. 7B, a“MMT_package_id_byte” parameter corresponds to the package ID, and an“asset_id_byte” parameter corresponds to the asset ID.

The assets making up a package may be limited to assets in a TLV stream,but may include assets transmitted by an IP data flow through thecommunication line as shown in FIG. 7A. This is made possible bydescribing location information of the asset in the MPT together withthe asset ID for identifying each asset contained in the package so thatthe broadcast receiving apparatus 100 according to the presentembodiment can know the reference destination of each asset. Thelocation information is specified by “MMT_general_location_info( )” inthe data structure of the MPT shown in FIG. 7B. FIG. 7C shows oneexample of a data structure of the location information.

In accordance with a value of a “location type” parameter of thelocation information, the broadcast receiving apparatus 100 can refer tovarious pieces of data transmitted through various transmission routesincluding:

(1) data multiplexed in the same IP data flow as the MPT(location_type=0x00);

(2) data multiplexed in an IPv4 data flow (location_type=0x01);

(3) data multiplexed in an IPv6 data flow (location_type=0x02);

(4) data multiplexed in a broadcasting MPEG2-TS (location_type=0x03);

(5) data multiplexed in an MPEG2-TS format in an IP data flow(location_type=0x04); and

(6) data located by a specified URL (location_type=0x05).

Among the reference destinations described above, (1) is, for example,an IP data flow that is contained in a TLV stream of a digitalbroadcasting signal that the broadcast receiving apparatus 100 accordingto the present embodiment receives via the antenna 100 a. However, in acase where the MPT is also included in an IP data flow on the side of acommunication line and is transmitted, the reference destination of (1)may be changed to an IP data flow received via the communication line.Further, (2), (3), (5), and (6) described above are IP data flows thatthe broadcast receiving apparatus 100 according to the presentembodiment receives via the communication line. In addition, (4)described above can be used when to refer to the data multiplexed inMPEG2-TS received by the receiving function of receiving digitalbroadcasting signals transmitted by the MPEG2-TS method on the basis oflocation information of the MPT included in a digital broadcastingsignal transmitted by the MMT method, in the case of the broadcastreceiving apparatus having both of a receiving function of receivingdigital broadcasting signals transmitted by the MMT method and areceiving function of receiving digital broadcasting signals transmittedby the MPEG2-TS method, like a broadcast receiving apparatus 800 of asecond embodiment (will be descried later).

Further, a presentation time and/or a decoding time can be specified inunits of MPU or access unit in the media such as video components andaudio components. Information on the presentation time and the decodingtime is described in the MPT as the MPU timestamp descriptor or the MPUextension timestamp descriptor. FIG. 7D shows one example of a datastructure of the MPU timestamp descriptor in which information regardingthe presentation time is described. Presentation time information ineach of MPUs is specified by an “MPU_presentation_time” parameter of theMPU timestamp descriptor. Further, the MPU that becomes a target of thespecification can be identified by an “MPU_sequence_number” parameter.In the broadcast receiving apparatus 100 according to the presentembodiment, a plurality of MPUs specified by the MPT can be presented(displayed or output) in conjunction with each other by using thepresentation time information, with reference to a clock based on theNTP which is time information expressed by the UTC notation. Further,the information regarding the decoding time is also similarly describedby the MPU extension timestamp descriptor, but its detailed explanationwill be omitted. Presentation control of various data using the clockbased on the NTP will be described later.

In the broadcasting system according to the present embodiment, a seriesof data of the “package” unit corresponds to “service” of the digitalbroadcasting. Further, the “service” is a series of “programs” that aretransmitted in accordance with a schedule. Each of the “programs” istreated in the MMT method as an “event”. A starting time and a durationtime of each of events are specified by the MH-EIT. Further, an ID ofthe MMT package to which each of the events is specified by the eventpackage descriptor included in the MH-EIT. FIG. 7E shows one example ofa data structure of the MH-EIT. The starting time is specified by a“start_time” parameter in FIG. 7E, and the duration time is specified bya “duration” parameter. FIG. 7F shows one example of a data structure ofthe event package descriptor. Correspondence between each event and theMMT package can be specified by the “MMT_package_id_byte” parameter ofthe event package descriptor included in the MH-EIT. The MH-EIT can beused for various processes performed in units of “event” (e.g., aprocess of creating an electronic program guide, a process ofcontrolling timer recording and viewing reservation, a process ofprotecting copy rights such as temporary data storage, etc.) in thebroadcast receiving apparatus 100 of the present embodiment.

[Hardware Configuration of Broadcast Receiving Apparatus]

FIG. 8A is a block diagram showing an example of an internalconfiguration of the broadcast receiving apparatus 100. The broadcastreceiving apparatus 100 includes a main control unit 101, a system bus102, a ROM 103, a RAM 104, a storage (accumulation) unit 110, the LANcommunication unit 121, an extension interface unit 124, a digitalinterface unit 125, the tuner/demodulating unit 131, a separating unit132, a video decoder 141, a video color gamut conversion unit 142, anaudio decoder 143, a caption decoder 144, a subtitle decoder 145, asubtitle synthesizing unit 146, a subtitle color gamut conversion unit147, a data decoder 151, a cache unit 152, an application control unit153, a browser unit 154, an application color gamut conversion unit 155,a sound source unit 156, a video synthesizing unit 161, a monitor unit162, a video output unit 163, an audio synthesizing unit 164, a speakerunit 165, an audio output unit 166, and an operation input unit 170.

The main control unit 101 is a microprocessor unit that controls thewhole of the broadcast receiving apparatus 100 in accordance with apredetermined operating program. The system bus 102 is a datacommunication path through which data is exchanged between the maincontrol unit 101 and each of operating blocks in the broadcast receivingapparatus 100.

The ROM (Read Only Memory) 103 is a non-volatile memory storing a basicoperating program such as operating system and other operating programs,and is provided as, for example, a rewritable ROM such as an EEPROM(Electrically Erasable Programmable ROM) and a flash ROM. The ROM 103may store operation set values necessary for the operation of thebroadcast receiving apparatus 100. The RAM (Random Access Memory) 104serves as a work area used when the basic operating program and otheroperating programs are executed. The ROM 103 and the RAM 104 may beintegrated with the main control unit 101. Further, a part of the memoryregion of the storage (accumulation) unit 110 may be used as the ROM 103instead of providing the ROM 103 having the independent configurationshown in FIG. 8A.

The storage (accumulation) unit 110 stores the operating programs andoperation set values of the broadcast receiving apparatus 100 andpersonal information of the user of the broadcast receiving apparatus100. In addition, the storage (accumulation) unit 110 can store anoperating program downloaded through the Internet 200 and various datacreated by the operating program. Further, the storage (accumulation)unit 110 can store such contents as moving images, still images, andsounds that are acquired from broadcast waves or downloaded through theInternet 200. A part of the memory region of the storage (accumulation)unit 110 may be used to substitute for a part or the whole of thefunction of the ROM 103. Further, the storage (accumulation) unit 110needs to retain the stored information even when power is not suppliedto the broadcast receiving apparatus 100 from an external power source.Therefore, the storage (accumulation) unit 110 is provided as, forexample, a non-volatile semiconductor element memory such as a flash ROMor an SSD (Solid State Driver) or a magnetic disk drive such as an HDD(Hard Disc Drive).

Note that the operating programs stored in the ROM 103 and the storage(accumulation) unit 110 can be added, updated and functionally extendedby a downloading process from server devices on the Internet 200.

The LAN (Local Area Network) communication unit 121 is connected to theInternet 200 via the router device 200 r, and transmits and receivesdata to and from server devices and other communication equipment on theInternet 200. Further, the LAN communication unit 121 acquires an MMTdata string (or part of it) of a program transmitted through thecommunication line. The LAN communication unit 121 may be connected tothe router device 200 r through wired communication or wirelesscommunication such as Wi-Fi (registered trademark). The LANcommunication unit 121 has a coding circuit, a decoding circuit, and thelike. In addition, the broadcast receiving apparatus 100 may furtherinclude other communication units such as a BlueTooth (registeredtrademark) communication unit, an NFC communication unit, and aninfrared communication unit.

The tuner/demodulating unit 131 receives broadcast waves transmittedfrom the radio tower 300 t via the antenna 100 a, and tunes to (selects)a channel giving a service that the user wishes to have, under thecontrol by the main control unit 101. Further, the tuner/demodulatingunit 131 demodulates a received broadcasting signal to acquire an MMTdata string. Although the example of FIG. 8A shows the configuration inwhich the broadcast receiving apparatus 100 has one tuner/demodulatingunit, the broadcast receiving apparatus 100 may be configured to have aplurality of tuner/demodulating units for the purpose of simultaneouslydisplaying a plurality of screens or recording a program on a differentchannel.

The separating unit 132 is an MMT decoder, and distributes a video datastring, an audio data string, a caption data string, a subtitle datastring, and the like which are real-time presentation elements to thevideo decoder 141, the audio decoder 143, the caption decoder 144, thesubtitle decoder 145, and the like, respectively, based on a controlsignal included in an MMT data string inputted to the separating unit132. Data inputted to the separating unit 132 may be an MMT data stringtransmitted through the broadcast transmission path to thetuner/demodulating unit 131 and demodulated therein or an MMT datastring transmitted through the communication line to the LANcommunication unit 121. Further, the separating unit 132 reproduces amultimedia application and filed data which is an element making up themultimedia application, and stores them temporarily in the cache unit152. In addition, the separating unit 132 extracts and outputsgeneral-purpose data to the data decoder 151 in order to use it for thestreaming of data used by a player that presents data other than video,audio, and subtitle or for the streaming of data for an application.Further, the separating unit 132 may perform control such as errorcorrection, access restriction, and the like on the input MMT datastring under the control by the main control unit 101.

The video decoder 141 decodes a video data string input from theseparating unit 132 and outputs video information. The video color gamutconversion unit 142 performs a color space conversion process on thevideo information decoded in the video decoder 141 when necessary, inpreparation for a video synthesizing process in the video synthesizingunit 161. The audio decoder 143 decodes an audio data string input fromthe separating unit 132 and outputs audio information. Further, forexample, streaming data of an MPEG-DASH (MPEG-Dynamic Adaptive Streamingover HTTP) format or the like acquired from the Internet 200 through theLAN communication unit 121 may be inputted to the video decoder 141 andthe audio decoder 143. A plurality of video decoders 141, video colorgamut conversion units 142, audio decoders 143, and the like may beprovided in order to simultaneously decode a plurality of kinds of videodata strings and audio data strings.

The caption decoder 144 decodes a caption data string input from theseparating unit 132 and outputs caption information. The subtitledecoder 145 decodes a subtitle data string input from the separatingunit 132 and outputs subtitle information. The caption informationoutput from the caption decoder 144 and the subtitle information outputfrom the subtitle decoder 145 are subjected to a synthesizing process inthe subtitle synthesizing unit 146 and then subjected to a color spaceconversion process in the subtitle color gamut conversion unit 147 whennecessary, in preparation for the video synthesizing process in thevideo synthesizing unit 161. In the present embodiment, among servicespresented simultaneously with the video of a broadcasting program andprovided mainly as text information, a service related to the videocontents is referred to as subtitle, while a service other than that isreferred to as caption. When these services are not distinguished fromeach other, they are collectively referred to as subtitle.

The browser unit 154 presents a multimedia application file and fileddata making up the multimedia application file, which are acquired fromthe cache unit 152 or a server device on the Internet 200 through theLAN communication unit 121, in accordance with an instruction of theapplication control unit 153, which interprets control informationincluded in an MMT data string and control information acquired from aserver device on the Internet 200 through the LAN communication unit121. Note that the multimedia application file may be, for example, anHTML (Hyper Text Markup Language) document or BML (Broadcast MarkupLanguage) document. The application information output from the browserunit 154 is subjected to a color space conversion process in theapplication color gamut conversion unit 155 when necessary, inpreparation for the video synthesizing process in the video synthesizingunit 161. Further, the browser unit 154 causes the sound source unit 156to reproduce application audio information.

The video synthesizing unit 161 receives video information output fromthe video color gamut conversion unit 142, subtitle information outputfrom the subtitle color gamut conversion unit 147, applicationinformation output from the application color gamut conversion unit 155,and the like, and performs a selection process and/or a superpositionprocess as appropriate. The video synthesizing unit 161 has a video RAM(not shown), and the monitor unit 162 and the like are driven based onvideo information and the like inputted to the video RAM. Further, thevideo synthesizing unit 161 performs a scaling process and a superposingprocess of EPG (Electronic Program Guide) screen information createdbased on information such as MH-EIT included in MMT-SI when necessaryunder the control by the main control unit 101. The monitor unit 162 is,for example, a display device such as liquid crystal panel, and offersthe video information subjected to the selection process and/orsuperposition process in the video synthesizing unit 161, to the user ofthe broadcast receiving apparatus 100. The video output unit 163 is avideo output interface that outputs the video information subjected tothe selection process and/or superposition process in the videosynthesizing unit 161.

Note that the presentation function of the broadcast receiving apparatus100 of the present embodiment has a logical plane structure fordisplaying a multimedia service in accordance with the intention of theservice provider. FIG. 8B shows one example of a configuration of thelogical plane structure that the presentation function of the broadcastreceiving apparatus 100 of the present embodiment has. In the logicalplane structure, a caption plane that displays captions is located onthe forefront layer, a subtitle plane that displays subtitles is locatedon the second layer, a multimedia plane that displays broadcast video,multimedia application or synthesized video thereof is located on thethird layer, and a background plane is located on the rearmost layer.The subtitle synthesizing unit 146 and the video synthesizing unit 161draw the caption information on the caption plane, the subtitleinformation on the subtitle plane, and the video information,application information, and the like on the multimedia plane. Further,background color is drawn on the background plane based on an LCTincluded in MMT-SI. Note that it is also possible to provide a pluralityof multimedia planes on the third layer in accordance with the number ofvideo decoders 141. However, even when a plurality of multimedia planesis provided, application information and the like output from theapplication color gamut conversion unit 155 are displayed only on themultimedia plane located on the forefront layer.

The audio synthesizing unit 164 receives audio information output fromthe audio decoder 143 and application audio information reproduced inthe sound source unit 156, and performs a selection process and/or amixing process as appropriate. The speaker unit 165 offers audioinformation subjected to the selection process and/or mixing process inthe audio synthesizing unit 164 to the user of the broadcast receivingapparatus 100. The audio output unit 166 is an audio output interfacethat outputs the audio information subjected to the selection processand/or mixing process in the audio synthesizing unit 164.

The extension interface unit 124 is a group of interfaces for extendingthe function of the broadcast receiving apparatus 100, and is configuredof an analog video and audio interface, a USB (Universal Serial Bus)interface, a memory interface, and the like in the present embodiment.The analog video and audio interface receives analog video and audiosignals from external video and audio output devices, and outputs analogvideo and audio signals to external video and audio input devices. TheUSB interface is connected to a PC and the like and transmits andreceives data to and from the PC and the like. An HDD may be connectedto the USB interface to record broadcasting programs and contents. Akeyboard and other USB devices may also be connected to the USBinterface. A memory card and other memory media are connected to thememory interface to transmit and receive data to and from them.

The digital interface unit 125 is an interface that outputs or receivescoded digital video data and/or digital audio data. The digitalinterface unit 125 can output an MMT data string acquired by thedemodulation in the tuner/demodulating unit 131, an MMT data stringacquired through the LAN communication unit 121, or mixed data of theMMT data strings as it is. Further, the MMT data string input from thedigital interface unit 125 may be controlled to be inputted to theseparating unit 132. It is also possible to output the digital contentsstored in the storage (accumulation) unit 110 via the digital interfaceunit 125 or store the digital contents to the storage (accumulation)unit 110 via the digital interface unit 125.

The digital interface unit 125 is provided as a DVI terminal, HDMI(registered trademark) terminal, or Displayer Port (registeredtrademark) terminal, and thus outputs and receives data in the formatcompliant with DVI specifications, HDMI specifications, or DisplayerPort specifications. Alternatively, the digital interface unit 125 mayoutput or receive data in a serial data format conforming to IEEE 1394specifications and the like. Further, the digital interface unit 125 maybe configured as an IP interface that performs the digital interfaceoutput via hardware such as Ethernet (registered trademark) and wirelessLAN. In such a case, the digital interface unit 125 and the LANcommunication unit 121 may share the hardware configuration.

The operation input unit 170 is an instruction input unit on whichoperation instructions to the broadcast receiving apparatus 100 areinput. In the present embodiment, the operation input unit 170 isconfigured of a remote control receiving unit that receives commandstransmitted from a remote controller and operation keys in which buttonswitches are arranged (not shown), or may be configured of either theremote control receiving unit or the operation keys. Alternatively, theoperation input unit 170 may be substituted by a touch panel overlaid onthe monitor unit 162 or by a keyboard and others connected to theextension interface unit 124. The remote controller (not shown) may besubstituted by the portable information terminal 700 having a remotecontrol command transmission function.

Note that, when the broadcast receiving apparatus 100 is a televisionreceiver or the like as mentioned above, the video output unit 163 andthe audio output unit 166 are not essential constituent elements of thepresent invention. Further, the broadcast receiving apparatus 100 is notlimited to a television receiver, but may be an optical disc driverecorder such as DVD (Digital Versatile Disc) recorder, a magnetic diskdrive recorder such as an HDD recorder, or an STB (Set Top Box). Thebroadcast receiving apparatus 100 may also be a PC (Personal Computer),a tablet terminal, a navigation device, a game machine, and the likehaving a digital broadcast receiving function and abroadcasting/communication cooperation function. When the broadcastreceiving apparatus 100 is the DVD recorder, the HDD recorder, STB, orthe like, the broadcast receiving apparatus 100 does not have to beprovided with the monitor unit 162 and the speaker unit 165. In such acase, the operation similar to that of the broadcast receiving apparatus100 of the present embodiment is possible by connecting an externalmonitor and an external speaker to the video output unit 163, the audiooutput unit 166, or the digital interface unit 125.

[Software Configuration of Broadcast Receiving Apparatus]

FIG. 8C is a software configuration diagram of the broadcast receivingapparatus 100 of the present embodiment, and shows respective softwareconfigurations of the ROM 103, the RAM 104, and the storage(accumulation) unit 110. In the present embodiment, the ROM 103 stores abasic operating program 1001 and other operating programs, and thestorage (accumulation) unit 110 stores a receiving function program1002, a cooperating function program 1003, a recording/reproducingfunction program 1004, and other operating programs. Further, thestorage (accumulation) unit 110 includes a contents memory region 1200storing such contents as moving images, still images, and sounds, anauthentication information memory region 1300 storing authenticationinformation and the like needed when access is made to an externalportable terminal or server device, and a various information memoryregion storing other various types of information.

The basic operating program 1001 stored in the ROM 103 is loaded ontothe RAM 104, and the loaded basic operating program 1001 is executed bythe main control unit 101 to configure a basic operation executing unit1101. Similarly, the receiving function program 1002, the cooperatingfunction program 1003, and the recording/reproducing function program1004 stored in the storage (accumulation) unit 110 are loaded onto theRAM 104, and the receiving function program 1002, the cooperatingfunction program 1003, and the recording/reproducing function program1004 thus loaded are executed by the main control unit 101 to configurea receiving function executing unit 1102, a cooperating functionexecuting unit 1103, and a recording/reproducing function executing unit1104, respectively. Further, the RAM 104 has a temporary memory regionthat temporarily saves data created at execution of each operatingprogram when necessary.

In the following, for simpler description, a process in which the maincontrol unit 101 loads the basic operating program 1001 from the ROM 103onto the RAM 104 and executes the basic operating program 1001 tocontrol each operating block is described simply as a process in whichthe basic operation executing unit 1101 performs control of eachoperating block. The same applies also to the description of otheroperating programs.

The receiving function executing unit 1102 controls each operating blockof the broadcast receiving apparatus 100 to reproduce video and audiocomponents transmitted by the broadcasting system of the presentembodiment. In particular, a transport processing unit 1102 a mainlycontrols the MMT decoder function of the separating unit 132, anddistributes a video data string, audio data string, and the likeseparated from an MMT data string to corresponding decode processingunits, respectively. An AV decode processing unit 1102 b mainly controlsthe video decoder 141, the audio decoder 143, and the like. Anapplication processing unit 1102 c mainly controls the cache unit 152,the application control unit 153, the browser unit 154, and the soundsource unit 156. A caption processing unit 1102 d mainly controls thecaption decoder 144. A subtitle processing unit 1102 e mainly controlsthe subtitle decoder 145. A general-purpose data processing unit 1102 fmainly controls the data decoder 151. An EPG generating unit 1102 ginterprets the descriptive contents of an MH-EIT and others included inMMT-SI to generate an EPG screen. A presentation processing unit 1102 hmainly controls the video color gamut conversion unit 142, the subtitlesynthesizing unit 146, the subtitle color gamut conversion unit 147, theapplication color gamut conversion unit 155, the video synthesizing unit161, and the audio synthesizing unit 164 based on the logical planestructure.

Further, the cooperating function executing unit 1103 manages deviceauthentication and connection, data transmission and reception, and thelike when the broadcast receiving apparatus 100 performs operationscooperated with an external apparatus such as the portable informationterminal 700. The recording/reproducing function executing unit 1104performs controls when broadcasting programs acquired from digitalbroadcast waves of the present broadcasting system, contents acquiredfrom each of server devices on the network, and the like are recorded inthe contents memory region 1200 of the storage (accumulation) unit 110or an external storage and the like that are connected to the extensioninterface unit 124 or when the broadcasting program and/or contents isreproduced.

The above-described operating programs may be stored in advance in theROM 103 and/or the storage (accumulation) unit 110 at the time ofproduct shipment, or may be acquired from the other application server500 and others on the Internet 200 through the LAN communication unit121 after the product shipment. Alternatively, the operating programsstored in a memory card, optical disc, and the like may be acquiredthrough the extension interface unit 124 and others.

[Configuration of Broadcast Station Server]

FIG. 9 is a block diagram showing an example of an internalconfiguration of the broadcast station server 300. The broadcast stationserver 300 includes a main control unit 301, a system bus 302, a RAM304, a storage unit 310, a LAN communication unit 321, and a digitalbroadcasting signal transmission unit 360.

The main control unit 301 is a microprocessor unit that controls thewhole of the broadcast station server 300 in accordance with apredetermined operating program. The system bus 302 is a datacommunication path through which data is exchanged between the maincontrol unit 301 and each of operating blocks in the broadcast stationserver 300. The ROM 304 serves as a work area used when each operatingprogram is executed.

The storage unit 310 stores a basic operating program 3001, abroadcasting contents management/distribution program 3002, and abroadcasting contents transmission program 3003, and includes abroadcasting contents memory region 3200 and a metadata memory region3300. The broadcasting contents memory region 3200 stores the contentsof broadcasting programs and others broadcasted by the broadcaststation. The metadata memory region 3300 stores metadata such as thetitles, IDs, summaries, casts, and broadcasting dates of thebroadcasting programs and copy control information related to programcontents.

Further, the basic operating program 3001, the broadcasting contentsmanagement/distribution program 3002, and the broadcasting contentstransmission program 3003 stored in the storage unit 310 are loaded ontothe RAM 304, and the respective loaded programs are executed by the maincontrol unit 301 to configure a basic operation executing unit 3101, abroadcasting contents management/distribution executing unit 3102, and abroadcasting contents transmission executing unit 3103.

In the following, for simpler description, a process in which the maincontrol unit 301 loads the basic operating program 3001 from the storageunit 310 onto the RAM: 304 and executes the basic operating program 3001to control each operating block is described simply as a process inwhich the basic operation executing unit 3101 performs control of eachoperating block. The same applies also to the description of otheroperating programs.

The broadcasting contents management/distribution executing unit 3102performs management of the contents of broadcasting programs stored inthe broadcasting contents memory region 3200 and the metadata stored inthe metadata memory region 3300, and performs control when the contentsof broadcasting programs and metadata are delivered to a serviceprovider based on a contract. Further, when delivering the contents ofbroadcasting programs and metadata to the service provider, thebroadcasting contents management/distribution executing unit 3102 mayperform a process of authenticating the service provider server 400based on the contract when necessary.

The broadcasting contents transmission executing unit 3103 manages atime schedule and others when transmitting an MMT data string, whichincludes the contents of broadcasting programs accumulated in thebroadcasting contents memory region 3200, and the titles and IDs ofbroadcasting programs and copy control information of program contentsaccumulated in the metadata memory region 3300, from the radio tower 300t via the digital broadcasting signal transmission unit 360.

The LAN communication unit 321 is connected to the Internet 200, andcommunicates with the service provider server 400 and others on theInternet 200. The LAN communication unit 321 has a coding circuit, adecoding circuit, and the like. The digital broadcasting signaltransmission unit 360 modulates an MMT data string composed of a videodata string, audio data string, program data string, and the like of thecontents of broadcasting programs accumulated in the broadcastingcontents memory region 3200, and transmits the modulated data string asthe digital broadcast waves through the radio tower 300 t.

[Configuration of Service Provider Server]

FIG. 10 is a block diagram showing an example of an internalconfiguration of the service provider server 400. The service providerserver 400 includes a main control unit 401, a system bus 402, a RAM404, a storage unit 410, and a LAN communication unit 421.

The main control unit 401 is a microprocessor unit that controls thewhole of the service provider server 400 in accordance with apredetermined operating program. The system bus 402 is a datacommunication path through which data is exchanged between the maincontrol unit 401 and each of operating blocks in the service providerserver 400. The ROM 404 serves as a work area that is used when eachoperating program is executed.

The storage unit 410 stores a basic operating program 4001, a videocontents management/distribution program 4002, and an applicationmanagement/distribution program 4004, and includes a video contentsmemory region 4200, a metadata memory region 4300, an application memoryregion 4400, and a user information memory region 4500. The videocontents memory region 4200 stores the contents of broadcasting programsprovided from the broadcast station server 300 as video contents, andstores video contents and the like created by the service provider. Themetadata memory region 4300 stores metadata provided from the broadcaststation server 300 and metadata related to video contents created by theservice provider. The application memory region 4400 stores variousapplications and others for distributing the services cooperated withbroadcasting programs in response to demands from television receivers.The user information memory region 4500 stores information (personalinformation, authentication information, etc.) related to a user who ispermitted to access the service provider server 400.

Further, the basic operating program 4001, the video contentsmanagement/distribution program 4002, and the applicationmanagement/distribution program 4004 stored in the storage unit 410 areloaded onto the RAM 404, and the respective loaded basic operatingprogram, video contents management/distribution program, and applicationmanagement/distribution program are executed by the main control unit401 to configure a basic operation executing unit 4101, a video contentsmanagement/distribution executing unit 4102, and an applicationmanagement/distribution executing unit 4104.

In the following, for simpler description, a process in which the maincontrol unit 401 loads the basic operating program 4001 stored in thestorage unit 410 onto the RAM 404 and executes the basic operatingprogram 4001 to control each operating block is described simply as aprocess in which the basic operation executing unit 4101 performscontrol of each operating block. The same applies also to description ofother operating programs.

The video contents management/distribution executing unit 4102 acquiresthe contents and others of broadcasting programs and metadata from thebroadcast station server 300, manages video contents and others andmetadata stored in the video contents memory region 4200 and themetadata memory region 4300, and controls distribution of the videocontents and others and metadata to television receivers. Further, whendistributing the video contents and others and metadata to thetelevision receivers, the video contents management/distributionexecuting unit 4102 may perform a process of authenticating thetelevision receivers when necessary. Further, the applicationmanagement/distribution executing unit 4104 manages applications storedin the application memory region 4400 and controls distribution of theapplications in response to demands from the television receivers.Further, when distributing the applications to the television receivers,the application management/distribution executing unit 4104 may performa process of authenticating the television receivers when necessary.

The LAN communication unit 421 is connected to the Internet 200, andcommunicates with the broadcast station server 300 on the Internet 200and the broadcast receiving apparatus 100 via the router device 200 r.The LAN communication unit 421 includes a coding circuit, a decodingcircuit, and the like.

[Hardware Configuration of Portable Information Terminal]

FIG. 11A is a block diagram showing an example of an internalconfiguration of the portable information terminal 700. The portableinformation terminal 700 includes a main control unit 701, a system bus702, a ROM 703, a RAM 704, a storage unit 710, a communicationprocessing unit 720, an extension interface unit 724, an operation unit730, an image processing unit 740, an audio processing unit 750, and asensor unit 760.

The main control unit 701 is a microprocessor unit that controls thewhole of the portable information terminal 700 in accordance with apredetermined operating program. The system bus 702 is a datacommunication path through which data is exchanged between the maincontrol unit 701 and each of operating blocks in the portableinformation terminal 700.

The ROM 703 is a memory storing a basic operating program such asoperating system and other operating programs, and is provided as, forexample, a rewritable ROM such as EEPROM and flash ROM. The RAM 704serves as a work area used when the basic operating program and otheroperating programs are executed. The ROM 703 and the RAM 704 may beintegrated with the main control unit 701. Further, a part of the memoryregion of the storage unit 710 may be used as the ROM 703 instead ofproviding the ROM 703 having the independent configuration shown in FIG.11A.

The storage unit 710 stores the operating programs and operation setvalues of the portable information terminal 700 and personal informationof the user of the portable information terminal 700. In addition, thestorage unit 710 can store an operating program downloaded through theInternet 200 and various data created by the operating program. Further,the storage unit 710 can store such contents as moving images, stillimages, and sounds that are downloaded through the Internet 200. Apartof the memory region of the storage unit 710 may be used to substitutefor apart or the whole of the function of the ROM 703. Further, thestorage unit 710 needs to retain the stored information even when poweris not supplied to portable information terminal 700 from an externalpower source. Therefore, the storage unit 710 is provided as, forexample, a non-volatile semiconductor element memory such as flash ROMor SSD or a magnetic disk drive such as an HDD.

Note that the operating programs stored in the ROM 703 and the storageunit 710 can be added, updated and functionally extended by thedownloading process from server devices on the Internet 200.

The communication processing unit 720 includes a LAN communication unit721, a mobile phone network communication unit 722, and an NFCcommunication unit 723. The LAN communication unit 721 is connected tothe Internet 200 via the router device 200 r and the access point 200 a,and transmits and receives data to and from server devices and othercommunication equipment on the Internet 200. The LAN communication unit721 is connected to the router device 200 r and the access point 200 athrough wireless communication such as Wi-Fi (registered trademark). Themobile phone network communication unit 722 performs telephonecommunication (telephone call) and data transmission and receptionthrough wireless communication with the base station 600 b on the mobilephone communication network. The NFC communication unit 723 communicateswirelessly with the corresponding reader/writer when located inproximity to the reader/writer. The LAN communication unit 721, themobile phone network communication unit 722, and the NFC communicationunit 723 each have a coding circuit, a decoding circuit, an antenna, andthe like. The communication processing unit 720 may further includesother communication units such as a BlueTooth (registered trademark)communication unit and an infrared communication unit.

The extension interface unit 724 is a group of interfaces for extendingthe function of the portable information terminal 700, and is configuredof a video and audio interface, a USB interface, a memory interface, andthe like in the present embodiment. The video and audio interfacereceives video and audio signals from external video and audio outputdevices, and outputs video and audio signals to external video and audioinput devices. The USB interface is connected to a PC and others andtransmits and receives data to and from the PC and others. A keyboardand other USB devices may also be connected to the USB interface. Amemory card and other memory media are connected to the memory interfaceto transmit and receive data to and from them.

The operation unit 730 is an instruction input unit that inputsoperation instructions to the portable information terminal 700. In thepresent embodiment, the operation unit 730 is composed of a touch panel730 t overlaid on a display unit 741 and operation keys 730 k in whichbutton switches are arranged. The operation unit 730 may be composed ofeither the touch panel 730 t or the operation keys 730 k. The portableinformation terminal 700 may be operated using a keyboard or the likeconnected to the extension interface unit 724, or may be operated usinga separate terminal device connected through wired communication orwireless communication. Namely, the portable information terminal 700may be operated through instructions from the broadcast receivingapparatus 100. Further, the display unit 741 may be provided with theabove-described touch panel function.

The image processing unit 740 includes the display unit 741, an imagesignal processing unit 742, a first image input unit 743, and a secondimage input unit 744. The display unit 741 is, for example, a displaydevice such as liquid crystal panel, and offers image data processed inthe image signal processing unit 742 to the user of the portableinformation terminal 700. The image signal processing unit 742 has avideo RAM (not shown), and the display unit 741 is driven based on imagedata inputted to the video RAM. Further, the image signal processingunit 742 has a function of performing processes of converting formats,superposing a menu and other OSD (On Screen Display) signals, and otherswhen necessary. Each of the first image input unit 743 and the secondimage input unit 744 is a camera unit that inputs image data ofsurroundings or a target object by converting light input through a lensinto electrical signals by using an electronic device such as a CCD(Charge Coupled Device) and CMOS (Complementary Metal OxideSemiconductor) sensor.

The audio processing unit 750 includes an audio output unit 751, anaudio signal processing unit 752, and an audio input unit 753. The audiooutput unit 751 is a speaker, and offers an audio signal processed inthe audio signal processing unit 752 to the user of the portableinformation terminal 700. The audio input unit 753 is a microphone, andconverts the voice of the user and others into audio data to input it tothe portable information terminal 700.

The sensor unit 760 is a group of sensors that detect the state of theportable information terminal 700, and includes a GPS receiving unit761, a gyro sensor 762, a geomagnetic sensor 763, an acceleration sensor764, an illuminance sensor 765, and a proximity sensor 766 in thepresent embodiment. These sensors make it possible to detect thelocation, tilt, angle, and motion of the portable information terminal700, and the brightness and the proximity of an object around theportable information terminal 700. The portable information terminal 700may further include other sensors such as a pressure sensor in additionto these sensors.

The portable information terminal 700 may be provided as a cellularphone, a smartphone, or a tablet terminal, or may be provided as a PDA(Personal Digital Assistants), a notebook PC, or the like.Alternatively, the portable information terminal 700 may be provided asa digital still camera, a video camera capable of taking movingpictures, a portable game machine, a navigation device, or otherportable digital devices.

The configuration example of the portable information terminal 700 shownin FIG. 11A includes a number of constituent elements that are notessential to the present embodiment such as the sensor unit 760, buteven the configuration that does not include such constituent elementsdoes not impair the effect of the present embodiment. The portableinformation terminal 700 may further include additional constituentelements (not shown) such as a digital broadcast receiving function andan electronic money settlement function.

[Software Configuration of Portable Information Terminal]

FIG. 11B is a software configuration diagram of the portable informationterminal 700 of the present embodiment, and shows respective softwareconfigurations of the ROM 703, the RAM 704, and the storage unit 710. Inthe present embodiment, the ROM 703 stores a basic operating program7001 and other operating programs, and the storage unit 710 stores acooperation control program 7002 and other operating programs. Further,the storage unit 710 includes a contents memory region 7200 storing suchcontents as moving images, still images, and sounds, an authenticationinformation memory region 7300 storing authentication information andothers needed when access is made to the television receiver or eachserver device, and a various information memory region storing othervarious types of information.

The basic operating program 7001 stored in the ROM 703 is loaded ontothe RAM 704, and the loaded basic operating program is executed by themain control unit 701 to configure a basic operation executing unit7101. Similarly, the cooperation control program 7002 stored in thestorage unit 710 is loaded onto the RAM 704, and the loaded cooperationcontrol program. 7002 is executed by the main control unit 701 toconfigure a cooperation control executing unit 7102. Further, the RAM704 has a temporary memory region that temporarily saves data created atexecution of each operating program when necessary.

In the following, for simpler description, a process in which the maincontrol unit 701 loads the basic operating program 7001 from the ROM 703onto the RAM 704 and executes the basic operating program 7001 tocontrol each operating block is described simply as a process in whichthe basic operation executing unit 7101 performs control of eachoperating block. The same applies also to the description of otheroperating programs.

The cooperation control executing unit 7102 manages deviceauthentication, connection, data transmission and reception, and thelike when the portable information terminal 700 performs operationscooperated with the television receiver. Further, the cooperationcontrol executing unit 7102 has a browser engine function for executingan application cooperated with the television receiver.

The above-described operating programs may be stored in advance in theROM 703 and/or the storage unit 710 at the time of product shipment, ormay be acquired from the other application server 500 and others on theInternet 200 through the LAN communication unit 721 or the mobile phonenetwork communication unit 722 after the product shipment.Alternatively, the operating programs stored in a memory card, opticaldisc, and the like may be acquired through the extension interface unit724 and others.

[Time Management of Broadcast Receiving Apparatus]

The broadcast receiving apparatus 100 according to the presentembodiment has two types of time management functions. A first timemanagement function is a time management function based on the NTP, anda second time management function is a time management function based onthe MH-TOT. In the following, the two types of time management functionswill be described.

<Time Management Function Based on NTP>

First, the time management function based on the NTP will be described.

FIG. 12A shows one example of a system configuration for clocksynchronization/presentation synchronization in the broadcasting systemcompatible with the broadcast receiving apparatus 100 of the presentembodiment. In the broadcasting system of the present embodiment, UTCexpressed in a 64-bit-length NTP timestamp format is transmitted fromthe broadcast transmitting system to the receiver (broadcast receivingapparatus 100 of the present embodiment). In the NTP timestamp format,“second or more” of UTC is expressed by 32 bits, and “less than second”is also expressed by 32 bits. In practice, however, it is difficult toreproduce one second in 32-bit precision. For this reason, for example,a clock with a frequency of “24^(th) power of 2” Hz (about 16.8 MHz) maybe used as a system clock for video system synchronization and a systemclock for operating a timepiece conforming to the NTP as shown in FIG.7C. Considering the fact that the frequency of a system clock adopted ina conventional broadcasting system is 27 MHz and the hardwareconfiguration of the receiver can be simplified, it is desirable that aclock whose frequency is exponentiation of 2 ranging from “24^(th) powerof 2” to “28^(th) power of 2” is adopted as the system clock.

When the frequency of the system clock is set to exponentiation of 2ranging from “24^(th) power of 2” to “28^(th) power of 2” in thebroadcast transmitting system and the receiver as described above, 4 to8 low-order bits in the NTP timestamp format transmitted from thebroadcast transmitting system to the receiver, the low-order bits beingnot referred to by a PLL (Phase Locked Loop) system for reproducing thesystem clock or the timepiece conforming to the NTP, may be fixed to “0”or “1”. Namely, when the frequency of the system cock is “n^(th) powerof 2” Hz (n=24 in FIG. 12A, the same applies hereinafter), “32-n”low-order bits in the NTP timestamp format may be fixed to “0” or “1”.Alternatively, the receiver may perform the process without regard forthe “32-n” low-order bits in the NTP timestamp format.

When receiving time information in the NTP format, the broadcasttransmitting system builds the PLL system with a 32+n bit counterincluding VCO (Voltage Controlled Oscillator) with a frequency of“n^(th) power of 2” Hz, thereby providing a transmission system clockthat synchronizes with the time information given from outside. Further,the broadcast transmitting system causes the overall signal processingunits to operate in synchronization with the system clock of “n^(th)power of 2” Hz. In addition, the broadcast transmitting systemperiodically transmits the output of the transmission system clock astime information in the NTP-length format to the receiver through thebroadcast transmission path. Note that “32-n” low-order bits, whichrepresent “less than second”, of 32 bits may also be fixed to “0” or “1”in the time information in the NTP-length format that is to betransmitted to the receiver side. Namely, this is because a system clockcounter of the broadcast transmitting system side is constituted by 32+nbits.

The receiver receives the time information in the NTP-length formatthrough the broadcast transmission path and reproduces a receptionsystem clock by the PLL system including the VCO with the frequency of“n^(th) power of 2” Hz in the same manner as the broadcast transmittingsystem. As a result, the reception system clock works in synchronizationwith the transmission system clock of the broadcast transmitting system.Further, by operating the signal processing system of the receiver insynchronization with the system clock of “n^(th) power of 2” Hz, clocksynchronization between the broadcast transmitting system and thereceiver can be achieved, and thus the stable signal reproduction can beachieved.

Further, a decoding time and a presentation time in units ofpresentation of video and audio signals are set based on the timeinformation in the NTP format in the broadcast transmitting system.

The decoding time is specified by the MPU extension timestamp descriptor(not shown in the drawings) stored in the MPT. Further, the presentationtime is specified by the MPU timestamp descriptor (see FIG. 7D) storedin the MPT. An “MPU_sequence_number (MPU sequence number)” parameter inthe MPU timestamp descriptor indicates the sequence number of the MPUthat describes a timestamp, an “MPU_presentation_time (MPU presentationtime)” parameter indicates the presentation time of the MPU in a 64-bitNTP timestamp format.

Namely, the receiver can control timing of presentation (display, outputand the like) for each of the MPUs such as video/audio signals,subtitles, captions or the like by referring the MPU timestampdescriptor stored in the MPT.

In the case of paying attention to the above-described control ofdecoding timing and presentation timing of video and audio signals inunits of presentation, synchronization of video and audio signals can beensured by a clock with a frequency of about “16^(th) power of 2” Hz(about 65.5 KHz). In this case, it is not necessary to refer to 16low-order bits in an NTP timestamp format described in an MPU timestampdescriptor or the like. Namely, when a clock of “m^(th) power of 2” Hz,which is generated by dividing the frequency of system clock, is usedfor the control of decoding timing and presentation timing, it is notnecessary to refer to “32-m” low-order bits in an NTP timestamp formatdescribed in an MPU timestamp descriptor or the like. Thus, the “32-m”low-order bits in the NTP timestamp format described in the MPUtimestamp descriptor or the like may be fixed to “0” or “1”.

<Time Management Function Based on MH-TOT>

FIG. 12B shows one example of a configuration of the time informationthat is to be transmitted in the NTP format in the time managementfunction based on the NTP described above. A “reference_timestamp”parameter, “transmit_timestamp” parameter, and the like in the NTPformat represent time data in the NTP-length format with a 64-bitlength, and an “mpu_presentation_time” parameter in the MPU timestampdescriptor also represents time data in the NTP timestamp format with a64-bit length. In the time data in the NTP-length format and the timedata in the NTP timestamp format, “second or more” of UTC is expressedby 32 bits, and “less than second” is also expressed by 32 bits. Namely,the time information in the NTP format can transmit the time informationup to “less than second”. Moreover, since the time information in theNTP format is expressed in the UTC notation, it is different from timemanagement in conventional digital broadcasting. As shown in FIG. 3, bymanaging both of a data flow transmitted through the broadcasttransmission path and a data flow distributed through the communicationline by means of the time information in the NTP format, it is possibleto match both of the data easily.

In contrast, the time information transmitted by the MH-TOT is asfollows.

FIG. 12C shows one example of the data structure of the MH-TOT. Thebroadcast receiving apparatus 100 according to the present embodimentcan acquire the current date and current time from a “JST_time”parameter included in the MH-TOT. As shown in FIG. 12D, the “JST_time”parameter includes the information of 16 lower-order bits of coded dataof the current date based on the Modified Julian Date (MJD) and theinformation of 24 bits representing the Japan Standard Time (JST) with 6blocks of 4-bit binary-coded decimal (BCD). The current date can becalculated by performing a given calculation on the 16-bit coded data ofthe MJD. Further, the 6 blocks of 4-bit binary-coded decimal are made upof first 2 blocks of 4-bit binary-coded decimal that represent “hour”with a two-digit decimal number, next 2 blocks of 4-bit binary-codeddecimal that represent “minute” with a two-digit decimal number, andlast 2 blocks of 4-bit binary-coded decimal that represent “second” witha two-digit decimal number.

Namely, a difference between time management based on the NTP format andtime management based on the MH-TOT is that the former time managementbased on the NTP format can transmit time information up to “less thansecond” as described above, while in the latter time management based onthe MH-TOT, only time information up to “in seconds” in JST notation canbe transmitted.

In the broadcast receiving apparatus 100 of the present embodiment, thetime management function based on the NTP that is the time informationexpressed in the UTC notation is used for the synchronization indecoding process and display process of broadcasting signal contentsincluding video, audio, subtitles, and captions, and other presentationdata, and thus it is possible to achieve a highly accuratesynchronization process. Further, by referring to time informationexpressed in the UTC notation instead of time information based onclocks of the broadcast station, it is also possible to perform thesynchronization in decoding process and display process between contentsreceived by broadcasting signals including video, audio, subtitles,captions, and other data and data received through the communicationline including video, audio, subtitles, and captions, and other data.

Moreover, in the broadcast receiving apparatus 100 according to thepresent embodiment, the time management function based on the “JST_time”including the 24-bit information expressed by 6 blocks of 4-bitbinary-coded decimal in the MH-TOT may be used for performing a processof presenting a current time to the user or each of the processes ofhandling the MH-EIT shown in FIG. 7E. In general, in the process ofpresenting the current time to the user, the broadcast receivingapparatus is rarely required to have the accuracy to the extent of lessthan “second”. Further, each piece of time information described in theMH-EIT is stored as 24-bit information composed of 6 blocks of 4-bitbinary-coded decimal, expressing “hour”, “minute”, and “second” withtwo-digit decimal numbers, like the EIT for conventional digitalbroadcasting that is transmitted by the MPEG2-TS method. For thisreason, the time management function based on the MH-TOT of thebroadcast receiving apparatus 100 according to the present embodimenteasily matches with each of processes of handling the MH-EIT.Specifically, each of the processes of handling the MH-EIT includes aprocess of creating an electronic program guide, a process ofcontrolling timer recording and viewing reservation, a process ofmanaging (or protecting) copyrights such as temporary data storage, andthe like, for example. This is because each of these processes is rarelyrequired to have the accuracy to the extent of less than “second”, andthe accuracy covering up to time unit “second” is enough.

Further, the process of creating an electronic program guide, theprocess of controlling timer recording and viewing reservation, theprocess of protecting copy rights such as temporary data storage, andthe like are functions incorporated even in a receiver of theconventional digital broadcasting system using the MPEG2-TS method.Accordingly, if the broadcasting system of the present embodiment isconfigured in such a way as to execute the time management processcompatible with the time management function of the conventional digitalbroadcasting system using the MPEG2-TS method in performing the processof creating an electronic program guide, the process of controllingtimer recording and viewing reservation, the process of protecting copyrights such as temporary data storage, and others, it becomesunnecessary to separately design process algorithms for these processes(process of creating an electronic program guide, process of controllingtimer recording and viewing reservation, process of protecting copyrights such as temporary data storage, etc.) when the broadcastreceiving apparatus having both of a receiving function of digitalbroadcasting by the conventional MPEG2-TS method and a receivingfunction of digital broadcasting by the MMT method is configured, andthe cost is thus reduced.

Further, even in a receiver that does not have the receiving function ofdigital broadcasting by the conventional MPEG2-TS method but has onlythe receiving function of digital broadcasting by the MMT method,algorithms for the function incorporated in the receiver of digitalbroadcasting system using the conventional MPEG2-TS method can beapplied without creating new algorithms for the processes of creating anelectronic program guide, controlling timer recording and viewingreservation, protecting copy rights such as temporary data storage, andthe like, and thus the development with less cost is possible.

Consequently, with the configuration in which the time managementfunction based on the “JST_time” parameter in the MH-TOT is used forperforming these processes (process of creating an electronic programguide, process of controlling timer recording and viewing reservation,process of protecting copy rights such as temporary data storage, etc.),even the broadcast receiving apparatus for the digital broadcasting bythe MMT method is made highly compatible with the broadcasting systemusing the conventional broadcasting method, and therefore can beprovided at low cost.

As describe above, the broadcast receiving apparatus 100 of the presentembodiment has the time management function using two types of timeinformation different in accuracy from each other. Namely, first timeinformation is expressed in the notation consistent with theconventional digital broadcasting system, while second time informationhas higher resolution power than the first time information. Using thesecond time information for the process of synchronizing contents dataof broadcasting signals achieves the information presentation processmore accurate than that in the conventional broadcasting system, andusing the first time information for the processes of creating anelectronic program guide, controlling timer recording and viewingreservation, protecting copy rights such as temporary data storage, andothers allows the broadcast receiving apparatus to be provided at lowcost.

Therefore, the broadcast receiving apparatus 100 of the presentembodiment has the two types of time management function describedabove, and it is thus possible to achieve both of the highly accurateinformation presentation and the cost reduction.

[First Modification Example of Time Management]

Next, a first modification example of the time management in thebroadcasting system of the present embodiment will be described below.

In the configuration of the first modification example, in order toimprove the accuracy of time management by the NTP-based time managementfunction that has already been described with reference to FIG. 12A,information related to an estimated delay time in time informationtransmission from a time management server (not shown in the drawings)or the broadcast station server 300 to the broadcast receiving apparatus100 is included in a broadcasting signal to be transmitted, and theinformation related to the estimated delay time is used to correct asystem clock for the NTP-based time management function in the broadcastreceiving apparatus 100.

At this time, the information related to the estimated delay time may beincluded in a TMCC (Transmission and Multiplexing Configuration Control)region outside the TLV multiplexing stream instead of the TLVmultiplexing stream of the protocol stack in the broadcast transmissionpath shown in FIG. 3(A). By transmitting the information in the TMCCregion, the information related to the estimated delay time can beextracted without performing a process of separating the TLVmultiplexing stream (demultiplexing process) in the broadcast receivingapparatus 100. Namely, the information acquisition that is less likelyto be affected by the delay in the separating process in the broadcastreceiving apparatus 100 is possible, and thus a highly accuratecorrecting process of the system clock can be performed. An example ofthe data structure of time information transmitted in the TMCC signalwill be described with reference to FIG. 12E. For example, the timeinformation is preferably stored in a TMCC extension information regionto be transmitted. In the time information in the TMCC extensioninformation region shown in FIG. 12E, a “delta” parameter expresses theestimated value of transmission delay from a time management server thatdistributes the UTC or a server device that generates a TMCC signal to ageneral broadcast receiving apparatus, in the form of a 32-bit signedfixed-point value. Note that the 16 high-order bits thereof represent aninteger part and 16 low-order bits thereof represent a decimal fraction.A “transmit_timestamp” parameter is a transmission timestamp, andexpresses a time at which the TMCC signal is transmitted from the serverdevice, in the NTP timestamp-length format. The 32 high-order bitsthereof represent an integer part, and the 32 low-order bits thereofrepresent a decimal fraction.

In the first modification example, the broadcast receiving apparatus 100of the present embodiment can correct more accurately the system clockfor the NTP-based time management function, which is used for theprocess of synchronizing contents data of broadcasting signals, by usingthe information related to the estimated delay time (e.g., the “delta”parameter and/or the “transmit_timestamp” parameter) described in thetime information stored and transmitted in the TMCC extensioninformation region.

[Second Modification Example of Time Management]

Next, a second modification example of the time management in thebroadcasting system of the present embodiment will be described below.

As describe above, the broadcast receiving apparatus 100 of the presentembodiment has the time management function of managing the time byacquiring the current date and the Japan Standard Time from theinformation transmitted in the MH-TOT. The current date and the JapanStandard Time acquired from the information transmitted in the MH-TOTare superposed on video information, application information, and othersin the video synthesizing unit 161 of the broadcast receiving apparatus100, and are offered to the user by outputting them to the monitor unit162 and video output unit 163. As described above, the MH-TOT has thedata structure shown in FIG. 12C, and the broadcast receiving apparatus100 can acquire the current date and the current time from the“JST_time” parameter in the MH-TOT.

However, since the “JST_time” parameter uses only the 16 low-order bitsof the MJD coded data, calculation for determining a date of “Apr. 22,2038” ends up in arithmetic overflow, and the above-describedpredetermined calculation cannot express the date following “Apr. 23,2038”. To deal with this problem, in the second modification example ofthe present embodiment, the calculation method is switched depending onwhether the value of the MJD is equal to or larger than a given value orthe value is smaller than the given value so that the date following“Apr. 23, 2038” can be expressed.

FIG. 12F shows one example of a first calculation method that is usedwhen the value of the MJD is equal to or larger than the given value anda second calculation method that is used when the value of the MJD issmaller than the given value. For example, when the given value is setto “32768 (0x8000)”, the current date is calculated by using the firstcalculation method in the case where the value of the MJD is equal to orlarger than “32768”, and is calculated by using the second calculationmethod in the case where the value of the MJD is smaller than “32768”.Note that the case in which the value of the MJD is smaller than “32768”is equivalent to the case in which the most significant bit of the16-bit data of the MJD is “0”. In this manner, the broadcast receivingapparatus 100 of the present embodiment can express the date following“Apr. 23, 2038”. However, the given value can be determined arbitrarily,and it may be set to, for example, “16384 (0x4000)” or “49152 (0xC000)”.The condition for switching the calculation method may be set to thecase where the 2 high-order bits of the 16-bit data of the MJD are “00”or the case where the 2 high-order bits of the 16-bit data of the MJDare not “11”. Note that, when the given value is set to “32768” and theabove-described method is used, a date preceding “Sep. 4, 1948” cannotbe expressed, but it does not pose a specific problem regarding thepractical use of the television receiver.

Alternatively, the first calculation method and the second calculationmethod may be switched depending on a flag that replaces a part or thewhole of a “reserved” parameter in the data structure of the MH-TOT ofFIG. 12C or depending on a newly added flag, instead of switching thefirst calculation method and the second calculation method depending onthe result of comparison between the MJD and the given value. Forexample, in the case where the most significant bit of the 16-bit codeddata of the MJD is “0”, the flag is set to “1” when the MJD valuerepresents the date following “Apr. 23, 2038”, and the flag is set to“0” when the MJD value does not represent the date following “Apr. 23,2038”. Then, when the flag is “1”, the second calculation method shownin FIG. 12F is used, while when the flag is “0”, the first calculationmethod is used. Alternatively, a descriptor having the same meaning asthe above-mentioned flag may be newly prepared and added to the MH-TOT.

As described above, in the broadcasting system of the presentembodiment, absolute time data in the NTP format is transmitted, and thebroadcast receiving apparatus 100 of the present embodiment has theNTP-based time management function. In addition, the broadcast receivingapparatus 100 of the present embodiment controls the decoding timing andpresentation timing of video and audio signals in units of presentationby referring to NTP timestamps and others described in MPU timestampdescriptors set in units of MPU. As described above, the timeinformation in the NTP format has the configuration shown in FIG. 12B.Further, the MPU timestamp descriptor has the configuration shown inFIG. 7D.

Accordingly, the broadcast receiving apparatus 100 of the presentembodiment may select either the first calculation method or the secondcalculation method in accordance with the value of time data and othersobtained by referring to the “reference_tiemstamp” parameter, the“transmit_timestamp” parameter, or the “mpu_presentation_time”parameter. Specifically, for example, when the most significant bit ofthe 64-bit time data in the NTP-length format is “0”, the secondcalculation method is used, and when the most significant bit is not“0”, the first calculation method is used.

By any of the above methods, the broadcast receiving apparatus 100 ofthe present embodiment can express the date following “Apr. 23, 2038”.

[Channel Selection Process (Initial Scan) in Broadcast ReceivingApparatus]

The AMT of the broadcasting system of the present embodiment provides alist of IP packet multicast groups that is used to receive IP packetstransmitted by the TLV multiplexing method without distinguishing themfrom IP packets transmitted through the communication line as much aspossible. A plurality of IP multicast groups can be listed for oneservice identification. In addition, in order to describe a series of IPaddresses efficiently, an address mask can be used.

In the broadcast receiving apparatus 100 according to the presentembodiment, a list of services acquired from the TLV-NIT can be storedin a non-volatile memory such as the ROM 103 and the storage unit 110 atthe time of channel scan in the initial setting or rescan for thesetting change, and a list of IP multicast groups corresponding to theservices can be associated with the services as IP-related informationand stored in the non-volatile memory. The list of services andIP-related information are stored in the non-volatile memory to bereferred to constantly, so that a need of acquiring the TLV-NIT or AMTat the time of channel switching and others is eliminated, and thus thebroadcasting contents can be efficiently acquired.

FIG. 13A is a diagram showing an example of an operation sequence at thetime of channel scan (rescan) in the broadcast receiving apparatus 100of the present embodiment.

When the channel scan starts, the receiving function executing unit 1102sets an initial frequency value for the tuner/demodulating unit 131 andinstructs the tuner/demodulating unit 131 to tune to the frequency value(S101). When the tuner/demodulating unit 131 succeeds in locking to theset frequency value (S102: Yes), the receiving function executing unit1102 acquires the TLV-NIT from a received signal (S103).

When the TLV-NIT acquired in the process of S103 is valid data (S104:Yes), the receiving function executing unit 1102 acquires information ofa TLV stream ID, an original network ID, and the like from the acquiredTLV-NIT (S105). FIG. 13B shows an example of the data structure of theTLV-NIT. The information of the TLV stream ID and the information of theoriginal network ID can be acquired from a “tlv_stream_id” parameter andan “original_network_id” parameter, respectively. Furthermore, deliverysystem information related to physical conditions for the broadcasttransmission path corresponding to the TLV stream ID and the originalnetwork ID is acquired from a delivery system descriptor (S106), and aservice ID list is acquired from a service list descriptor (S107).

FIG. 13C shows one example of the data structure of a satellite deliverysystem descriptor. FIG. 13D shows one example of the data structure of aservice list descriptor. Note that, when the TLV-NIT has a plurality ofdifferent pieces of data such as the TLV stream ID, the original networkID, the delivery system information, and the service ID list, theprocesses of S105 to S107 are repeated. Subsequently, the receivingfunction executing unit 1102 creates a service list based on dataacquired in the processes of S105 to S107 such as the TLV stream ID, theoriginal network ID, the delivery system information, and the service IDlist, and stores the created service list in the ROM 103 or the storageunit 110 (updates the service list at the time of rescan) (S108).

Next, the receiving function executing unit 1102 then acquires an AMTfrom the received signal (S109), and further acquires a list of IPmulticast groups related to each service ID stored in the service list(S110). FIG. 13E shows an example of the data structure of the AMT. Notethat, when the AMT has lists of IP multicast groups related to aplurality of service IDs, the process of S110 is repeated. When there isa plurality of AMTS having lists of IP multicast groups related todifferent service IDs, the processes of S109 and S110 are repeated.Next, the receiving function executing unit 1102 then associates thelist of IP multicast groups acquired in the process of S110 with theservice ID as IP-related information, and stores the IP-relatedinformation in the ROM 103 or the storage unit 110 (updates theIP-related information at the time of rescan) (S111).

When the tuner/demodulating unit 131 fails in locking to the setfrequency value in the process of S102 (S102: No) and when the TLV-NITacquired in the process of S103 is not valid data (S104: No), theprocesses of S105 to S111 are not performed.

After finishing the process of S111, when finding that the frequencyvalue set for the tuner/demodulating unit 131 is a final frequency valuein a channel scan range (S112: Yes), the receiving function executingunit 1102 ends the operation sequence. On the other hand, when findingthat the set frequency value is not the final frequency value in thechannel scan range (S112: No), the receiving function executing unit1102 increases the frequency value set for the tuner/demodulating unit131 (S113) and repeats the processes of S102 to S111. Note that, if theservice IDs for all services making up the broadcasting network can beacquired from one TLV-NIT and an AMT having lists of IP multicast groupsrelated to the service IDs can be acquired, the processes of S112 andS113 are unnecessary.

Through the series of processes described above, when performing thechannel scan for initial setting or the rescan for setting change, thebroadcast receiving apparatus 100 of the present embodiment cancreate/update a list of services making up the broadcasting network(service list), and at the same time, create/update a list of IPmulticast groups corresponding to each service (IP-related information)and store the created service list and IP-related information in anon-volatile memory such as the ROM 103 and the storage unit 110.

Note that the rescan for setting change may be automatically performedwhen a change in the information in the table is detected by referringto respective “version number” parameters of the TLV-NIT and AMT. When achange in the “version number” parameter of either the TLV-NIT or AMT isdetected, only the information related to the table in which the changein parameter is detected may be automatically updated. However, when theabove-described automatic updating is performed, execution of theautomatic rescan should preferably be reported to the user.Alternatively, the change in the information in the table may bereported to the user so that the user makes a decision on whether or notto perform the rescan.

[Channel Selection Process (Channel Switching) in Broadcast ReceivingApparatus]

FIG. 14A is a diagram showing one example of an operation sequence atthe time of channel selection (channel switching) in the broadcastreceiving apparatus 100 of the present embodiment.

When the user gives a command to switch a channel by operating a remotecontroller and others (not shown), the receiving function executing unit1102 interprets the command transmitted from the remote controller andspecifies a service ID of an intended service (S201). Next, thereceiving function executing unit 1102 then starts to acquire an AMTfrom the signal received from the tuner/demodulating unit 131. Whensucceeding in acquiring the AMT within a given time (S202: Yes), thereceiving function executing unit 1102 acquires information related to alist of IP multicast groups corresponding to the service ID, from theacquired AMT (S204). When failing to acquire the AMT within the giventime (S202: No), the receiving function executing unit 1102 refers tothe IP-related information stored in the ROM 103 or the storage unit 110(S203), thereby acquiring information related to the list of IPmulticast groups corresponding to the service ID (S204). Note that thereceiving function executing unit 1102 may always refer to theIP-related information stored in the ROM 103 or the storage unit 110without performing the determination process of S202.

Subsequently, the receiving function executing unit 1102 starts toacquire the TLV-NIT from the signal received from the tuner/demodulatingunit 131. When succeeding in acquiring the TLV-NIT within a given time(S205: Yes), the receiving function executing unit 1102 acquiresdelivery system information for acquiring an IP data flow correspondingto the service ID, from the acquired TLV-NIT (S207). When failing toacquire the TLV-NIT within the given time (S205: No), the receivingfunction executing unit 1102 refers to the service list stored in theROM 103 or the storage unit 110 (S206), thereby acquiring the deliverysystem information for acquiring the IP data flow corresponding to theservice ID (S207). Note that the receiving function executing unit 1102may always refer to the service list stored in the ROM 103 or thestorage unit 110 without performing the determination process of S205.

When the delivery system information has been acquired in the process ofS207, the receiving function executing unit 1102 then controls thetuner/demodulating unit 131 with the frequency value specified by theacquired delivery system information, receives the IP data flowcorresponding to the service ID (S208), extracts an MMT data string fromthe received IP data flow, and outputs the MMT data string to theseparating unit 132.

In the separating unit 132, the transport processing unit 1102 aacquires an MMTP packet with a packet ID “0”, from the input MMT datastring (S209), and further acquires an MPT from the acquired MMTP packet(S210). Next, the transport processing unit 1102 a then refers to an“MMT_package_id_byte” parameter included in the acquired MPT, and checkswhether the 16 low-order bits of the “MMT_package_id_byte” parameterhave the same value as the service ID. When the 16 low-order bits of the“MMT_package_id_byte” parameter have the same value as the service ID inthe example of the data structure of the MPT shown in FIG. 7B (S211:Yes), the transport processing unit 1102 a determines that the MMTPpacket with the packet ID “0” is an MMTP packet having the data of theprogram corresponding to the service ID, and shifts to an acquiringprocess of an MFU based on information included in the acquired MPT(S216).

On the other hand, when the 16 low-order bits of the“MMT_package_id_byte” parameter do not have the same value as theservice ID (S211: No), it is determined that the MMTP packet with thepacket ID “0” is not the MMTP packet having data of the programcorresponding to the service ID. In this case, the transport processingunit 1102 a newly acquires a PLT (S212), and checks the acquired PLT toconfirm a packet ID (x in this case) of an MMTP packet that transmits anMPT having the “MMT_package_id_byte” parameter corresponding to theservice ID (S213). Further, the transport processing unit 1102 a thenacquires an MMTP packet with a packet ID “x” from the above-mentionedinput MMT data string (S214), and acquires an MPT from the acquired MMTPpacket (S215). Moreover, the transport processing unit 1102 a thenstarts the acquiring process of the MFU based on information included inthe acquired MPT (S216).

Note that the transport processing unit 1102 a may always perform theprocesses of S212 to S215 without performing the processes of S209 toS211. In this case, the process time can be reduced when the data of theprogram corresponding to the service ID is stored in an MMTP packetother than the MMTP packet with the packet ID “0”.

Here, the process described above of specifying the packet ID of theMMTP packet having data on the program corresponding to the service IDto acquire the MPT by confirming the PLT will be described. The MMTPpacket with the packet ID “0” indicates that the PA message is to betransmitted. In the case of multiplexing a plurality of packages, asshown in FIG. 14B, a PLT (package list table) is contained in this PAmessage. The PLT has a list of packet IDs of MMTP packets to each ofwhich the PA message containing an MPT of other package is to betransmitted. By confirming the PLT, it is possible to specify, from thepackage ID, the MMTP packet to which the PA message containing the MPTthat becomes an entry point of each service is to be transmitted. FIG.14C shows one example of a data structure of the PLT. Locationinformation to which the PA message of the package indicated by the“MMT_package_id_byte” parameter is to be transmitted is specified by the“MMT_general_location_info( )”.

The description returns to the operation sequence shown in FIG. 14A. Inthe acquiring process of the MFU, the transport processing unit 1102 afirst refers to the MPT acquired in the processes at S210 or S215 toacquire an IP address and a packet ID of an IP data flow through which adesired MFU is to be transmitted (S216). Further, the presentation timeand the layout number of the MPU are respectively acquired from the MPUtimestamp descriptor included in the MPT and the MPU presentation regionspecifying descriptor included in the MPT (S217, S218), and the MFU isfurther acquired on the basis of the acquired IP address and packet IDof the IP data flow (S219). Next, coded video data, coded audio data,and the like are extracted from the acquired MFU, and a video/audiodecoding process based on control of the AV decode processing unit 1102b is executed. A presenting process based on the information regardingthe presentation time and the information regarding the layout controlthus acquired is executed by control of the presentation processing unit1102 h (S220).

In a case where the PLT cannot be acquired in the process at S212, the“MMT_package_id_byte” parameter that coincides with the service IDcannot be confirmed in the process at S213, or the MMTP packet whosepacket ID is “x” cannot be acquired in the process at S215, a programimage output process based on the data on the MMTP packet whose packetID acquired in the process at S210 is “0” (that is, the processes atS216 to S220) may be executed. Further, in this case, a messageindicating that a program corresponding to the service ID selected bythe user cannot be displayed may be displayed.

Through the series of processes described above, the broadcast receivingapparatus 100 of the present embodiment can execute a channel selection(channel switching) operation. In particular, as described above withreference to FIGS. 13A and 14A, a service list and IP-relatedinformation are created and are stored in a non-volatile memory such asthe ROM 103 and the storage unit 110 so as to be referred to constantlyat the time of channel scan for initial setting or rescan for settingchange, and the service list and

IP-related information stored in a non-volatile memory such as the ROM103 and the storage unit 110 are referred to at the time of channelselection (channel switching), so that the efficiency of the channelselection (channel switching) operation can be improved. Namely, thetime taken from the start to end of the channel selection (channelswitching) can be reduced, compared to a case where the AMT and theTLV-NIT are acquired again at the time of channel selection (channelswitching).

[Remote Controller Key Setting Process of Broadcast Receiving Apparatus]

FIG. 15A shows one example of appearance of a remote controller 100Rthat is used for input of an operation instruction to the broadcastreceiving apparatus 100 according to the present embodiment. The remotecontroller 100R at least includes a power source key 100R1, a numerickeypad 100R2, a channel up/down key 100R3, a menu key 100R4, an EPG key100R5, a cursor key 100R6, a determination key 100R7, and a color key100R8. The remote controller 100R may further include a volume up/downkey, a network switching key, an input switching key, a recording key, areproducing key, and the like.

For example, in the process at S201 of the operation sequence at thetime of the channel selection shown in FIG. 14A, the following threemethods may be used in a case where switching of channels is instructedto the broadcast receiving apparatus 100 according to the presentembodiment by using the remote controller 100R. A first method is amethod of directly inputting and specifying a service ID of a desiredchannel (or service) by pressing any key of the numeric keypad 100R2several times. A second method is a method of changing channels in aforward direction (or a reverse direction) until a desired channel (orservice) is displayed by repeatedly pressing the channel up/down key100R3 as needed. A third method is a method of carrying out so-calledone-touch channel selection to call a predetermined channel (or service)associated with each of keys of the numeric keypad 100R2 by pressing thecorresponding key of the numeric keypad 100R2 only once. Although theone-touch channel selection that is the third method is a user-friendlychannel selection method, it is necessary that setting of association ofpredetermined channels (or services) to the respective keys of thenumeric keypad 100R2 is carried out for the broadcast receivingapparatus 100 in advance.

The broadcast receiving apparatus 100 corresponding to the broadcastingsystem according to the present embodiment can automatically execute thesetting of association on the basis of control information contained inthe digital broadcast waves received by the tuner/demodulating unit 131.Namely, the broadcasting system according to the present embodimentprepares a remote control key descriptor as a descriptor for TLV-SI. Thesetting of association may be executed by referring the remote controlkey descriptor.

FIG. 15B shows one example of a data structure of the remote control keydescriptor. A “service_id” parameter in FIG. 15B is a service ID foridentifying a channel (or service). A “remote_control_key_id” parameteris a recommended value of a remote controller button number to which thechannel (or service) identified by the service ID is assigned. Thechannel (or service) identified by the “service_id” parameter may beassociated with a key specified by the “remote_control_key_id” parameterof the numeric keypad 100R2 in accordance with a value of each of theparameters.

In a case where the number of channels (or services) in the same networkis large, the channels (or services) may be assigned to other keys thanthe numeric keypad 100R2. For example, predetermined channels (orservices) may respectively be assigned to keys of the color key 100R8.In this case, a numerical value corresponding to the“remote_control_key_id” parameter may also be assigned to each key ofthe color key 100R8 in advance.

The remote control key descriptor may be described as a descriptor ofthe TLV-NIT. Thus, for example, in a case where the TLV-NIT acquired inthe process at S103 in the operation sequence at the time of the channelscan shown in FIG. 13A is effective data, the setting of association maybe executed together with the processes at S105 to S107 by storingdescriptive contents of the remote control key descriptor in the ROM 103of the broadcast receiving apparatus 100 or a non-volatile memory suchas the storage unit 110.

The setting of association may be executed by appropriately assigningservices of arbitrary channels to the respective keys of the numerickeypad 100R2 in accordance with user's own taste in addition to themethod of executing it in accordance with the descriptive contents ofthe remote control key descriptor as described above. Further, both ofthe setting of association based on the descriptive contents of theremote control key descriptor and the setting of association assigned inaccordance with the user's own taste may be stored in the non-volatilememory of the broadcast receiving apparatus 100 at the same time, andonly one setting may be used by selection of a menu operation or thelike. Further, in this case, the setting of association assigned inaccordance with the user's own taste may be used on a priority basis.Further, the setting of association based on the descriptive contents ofthe remote control key descriptor may be used preferentially inaccordance with a value of a priority flag described in the remotecontrol key descriptor compared with the setting of association assignedin accordance with the user's own taste. The priority flag may be set byusing a part or all of the “reserved” parameter of the remote controlkey descriptor shown in FIG. 15B, or may be set by adding a newparameter thereto. In this case, the value of the priority flag may beallowed to be controlled for each service ID.

Further, in a case where the setting of association assigned inaccordance with the user's own taste is stored in the non-volatilememory, the setting of association based on the descriptive contents ofthe remote control key descriptor may not be allowed to be stored in thenon-volatile memory. Further, only the setting of association assignedin accordance with the user's own taste is stored in the non-volatilememory of the broadcast receiving apparatus 100. In a case where theremote control key descriptor is described in the TLV-NIT that is beingreceived, the setting of association based on the descriptive contentsof the remote control key descriptor is used. In a case where the remotecontrol key descriptor is not described in the TLV-NIT that is beingreceived, the setting of association assigned in accordance with theuser's own taste may be used.

A process of changing the association of a predetermined channel (orservice) with each key of the numeric keypad 100R2 in accordance withthe descriptive contents of the remote control key descriptor may beexecuted for all services described in service list descriptor on thenetwork specified by the TLV-NIT at the same time, or may be executedfor only a part of the services. In a case where the process is executedfor only a part of services, the old setting of the association for eachof the other services may be held as they are. Further, in a case wherethe “service_id” parameter is a predetermined value (for example, 999 orthe like), only the setting specified by the “remote_control_key_id”parameter of the set contents stored in the non-volatile memory of thebroadcast receiving apparatus 100 may be deleted.

Namely, the broadcast receiving apparatus 100 according to the presentembodiment can execute the setting of association of a predeterminedchannel (or service) with each key of the numeric keypad 100R2.

[Program Selecting Process for Multi Programming Channel]

In the broadcasting system according to the present embodiment, multiprogramming is available in which a plurality of programs is broadcaston one channel (or service) in parallel. In a case where simultaneousbroadcasting of a plurality of programs is executed by the multiprogramming, it is thought that the one-touch channel selectiondescribed above can be carried out for a main channel of the multiprogramming, but cannot be carried out for a sub channel of the multiprogramming. Namely, in a case where a channel is selected from the subchannel of the multi programming, it is necessary to use a method ofdirectly inputting and specifying a service ID, or a method of selectinga desired sub channel by pressing the channel up/down key 100R3 after achannel is temporarily selected from the main channel of the multiprogramming by the one-touch channel selection. There is a problem thatan operation becomes complicated.

In order to solve the problem, in the broadcast receiving apparatus 100according to the present invention, a function of the one-touch channelselection is extended. By repeatedly pressing any key in the numerickeypad 100R2 to which a predetermined service ID is assigned severaltimes within a given time, the channel can be directly selected from thesub channel of the multi programming.

This will be described with reference to FIG. 16A. For example, serviceof 011 channel is assigned in advance to “1” key in the numeric keypad100R2 of the remote controller 100R. In this case, in a case where thereis a channel selection operation in a state that the multi programmingis not executed (see (A) in FIG. 16A), the 011 channel is selectedregardless of the number of times to press the “1” key. On the otherhand, in a case where there is a channel selection operation in a statethat the multi programming is executed (see (B) in FIG. 16A), the 011channel is selected by pressing the “1” key once. When the “1” key ispressed again within the given time since first pressing of the “1” key,012 channel is selected. Similarly, in a case where the “1” key ispressed three times within the given time, 013 channel is selected. In acase where the “1” key is pressed again over the given time since thefirst pressing of the “1” key, a state of selecting the 011 channel maybe maintained.

By allowing the operation as described above, in the broadcast receivingapparatus 100 according to the present invention, it is possible todirectly select a sub channel by more simple operation at the time ofthe multi programming.

Similarly, angle selection of a multiview compliant program or selectionof a predetermined video asset from a plurality of video assets may beexecuted by repeatedly pressing any key of the numeric keypad 100R2several times. As shown in FIG. 16B, in a case where a service ID of themultiview compliant program is assigned to the “1” key of the numerickeypad 100R2 in the remote controller 100R, the multiview compliantprogram is selected by pressing the “1” key once, and a main view isdisplayed. Further, when the “1” key is pressed again within the giventime since the first pressing of the “1” key, sub view 1 of themultiview compliant program is displayed. Similarly, in a case where the“1” key is pressed three times within the given time, sub view 2 of themultiview compliant program is displayed. In a case where the “1” key ispressed again over the given time since the first pressing of the “1”key, the main view of the multiview compliant program may be displayedas it is. The selection of the predetermined video asset from theplurality of video assets may be allowed by the similar operationdescribed above.

In the broadcast receiving apparatus 100 according to the presentinvention, by allowing the operation as described above, it is possibleto select angle selection of the multiview compliant program and apredetermined video asset from a plurality of video assets by moresimple operation.

In a case where one or more program at the time of the multi programmingis a multiview compliant program or a program having a plurality ofassets, only one of the operations may be effective and the other may beineffective. For example, in a case where one or more program at thetime of the multi programming is the multiview compliant program or theprogram having the plurality of assets, the operation to press the samekey several times within the given time is assigned to a process ofdirectly selecting a sub channel at the time of the multi programming.Whether any operation is effective or ineffective may be defined inadvance, or may be selected by the user.

[Screen Layout Control of Broadcast Receiving Apparatus]

The broadcast receiving apparatus 100 of the present embodiment cancontrol the screen layout based on the description of an LCT. FIG. 17Ashows one example of a data structure of the LCT. FIG. 17B shows oneexample of a data structure of the MPU presentation region specifyingdescriptor.

In the data structure of the LCT, a “left_top_pos_x” parameter and a“right_down_pos_x” parameter indicate a horizontal position on the topleft of a region and a horizontal position on the bottom right of theregion in terms of the ratio of the number of pixels to the total numberof pixels arranged in the horizontal direction, respectively, when theleft side of the full-screen display is defined as “0” and the rightside of the same is defined as “100”. A “left_top_pos_y” parameter and a“right_down_pos_y” parameter indicate a vertical position on the topleft of the region and a vertical position on the bottom right of theregion in terms of the ratio of the number of pixels to the total numberof pixels arranged in the vertical direction, respectively, when the topside of the full-screen display is defined as “0” and the bottom side ofthe same is defined as “100”. Further, a “layer order” parameterindicates a relative position in the depth direction of the region.

Examples of layout assignment to layout numbers based on the parametersetting will be described below together with set values for theparameters.

FIG. 17C shows default layout setting of the broadcast receivingapparatus 100 of the present embodiment, and shows an example in whichone region is set for the full-screen. FIG. 17D shows an example inwhich the full-screen is divided into three regions, and the respectiveregions are defined as “region 0”, “region 1” and “region 2”. Forexample, when the full-screen is made up of 7680 horizontal pixels×4320vertical pixels, the “region 0” is set within a range of (0, 0)-(6143,3455) because the “left_top_pos_x” parameter is “0”, the“left_top_pos_y” parameter is “0”, the “right_down_pos_x” parameter is“80”, and the “right_down_pos_y” parameter is “80”. In the same manner,the “region 1” is set within a range of (6144, 0) to (7679, 4319), andthe “region 2” is set within a range of (0, 3456) to (6143, 4319).

FIG. 17E shows an example in which three regions are set like theexample of FIG. 17D. In the example of FIG. 17E, however, the “region 0”is set within a range of (0, 0) to (7679, 4319), and the “region 1” and“region 2” are set within the same ranges of the “region 1” and “region2” described above and are located in front of the “region 0” inaccordance with the setting of the “layer order” parameter. FIG. 17Fshows an example in which the “region 0” is set in a device 0 (defaultdevice: broadcast receiving apparatus 100 in the present embodiment) andthe “region 1” is set in a device 1 (portable information terminal 700in the present embodiment).

As described above, in the broadcasting system of the presentembodiment, screen layout control for displaying multimedia services onthe receiver in a manner intended by the service provider can beperformed by using the LCT.

Note that a predetermined background color specified by a backgroundcolor specifying descriptor described in the LCT may be displayed in aregion in which a program video and a data screen are not displayed bythe screen layout control described above. Further, in a case where thebackground color specifying descriptor is not contained in the LCT, in acase where the broadcast receiving apparatus 100 cannot acquire thebackground color specifying descriptor correctly, or in a case where thepredetermined background color specified by the background colorspecifying descriptor cannot be displayed by hardware limit, apredetermined pattern defined by the broadcast receiving apparatus 100in advance may be displayed in the region. Further, the region may beused as a notification display region from the broadcast receivingapparatus 100 to the user. Note that the notification may be arbitraryinformation.

Note that decimal fractions that are generated when the screen isdivided in accordance with the setting values of the “left_top_pos_x”parameter and others are rounded up or down, or rounded off (or in thecase of binary numbers, “0” is rounded down while “1” is rounded up).For example, when the full-screen is made up of 7680 horizontalpixels×4320 vertical pixels and the “left_top_pos_x” parameter of the“region 0” is “0”, the “left_top_pos_y” parameter is “0”, the“right_down_pos_x” parameter is “51”, and the “right_down_pos_y”parameter is “51”, the “region 0” may be set within a range of (0,0)-(3916, 2203) by rounding up decimal fractions or may be set within arange of (0, 0)-(3915, 2202) by rounding down decimal fractions.Alternatively, decimal fractions may be rounded up or down in units of8-pixel blocks or 16-pixel blocks in consideration of macro-blocks atthe time of an image compression process. Through the process describedabove, region setting based on the LCT and conversion of the resolutionof multimedia contents in the above region can be performed efficiently.

Alternatively, the setting value of the parameter such as the“left_top_pos_x” may be limited to only “multiples of 5” or “multiplesof 10” in a range from “0” to “100”. In this case, it is possible toexecute the region setting appropriately.

Note that the contents displayed in each of the regions are specified bythe MPU presentation region specifying descriptor shown in FIG. 17B. Thecontents of an MPU whose sequence number is specified by an“MPU_sequence_number” parameter in FIG. 17B are associated with thedescription of the LCT by a “layout_number” parameter and a“region_number” parameter.

Further, a plurality of the “layout_number” parameter and the“region_number” parameter may be described in a first “for” loop of thedescription of the MPU presentation region specifying descriptor withrespect to one “MPU_sequence_number” parameter. The user may be causedto select whether layout control is executed in accordance with anydescription. For example, in a case where a “layout_number1” parameter,a “region_number1” parameter, a “layout_number2” parameter, and a“region_number2” parameter are described in the first “for” loop withrespect to a predetermined “MPU_sequence_number” parameter, the user iscaused to select whether the layout control of the MPU specified by the“MPU_sequence_number” parameter is executed on the basis of the“layout_number1” parameter and the “region_number1” parameter or on thebasis of the “layout_number2” parameter and the “region_number2”parameter. In this manner, the user can carry out the layout controlregarding the video program in accordance with user's own taste.

[Exceptional Process of Screen Layout Control of Broadcast ReceivingApparatus]

Even when the control of the screen layout region is performed based onthe LCT in the broadcast receiving apparatus 100 of the presentembodiment, if the user gives an instruction to display an EPG screen,the broadcast receiving apparatus 100 of the present embodiment canperform the screen layout control in which the descriptive contents ofthe LCT is left out of account, as an exceptional process. FIG. 18Ashows one example of an operation of the exceptional process of thescreen layout control based on the LCT.

When the screen layout control similar to that shown in FIG. 17D isperformed based on the descriptive contents of the LCT, a video ofbroadcasting program is displayed in the “region 0”, and broadcastingcontents such as program-cooperation data cooperated with thebroadcasting program are displayed in the “region 1” and the “region 2”,if the user gives an instruction to display an EPG screen with theremote controller (not shown), the broadcast receiving apparatus 100 ofthe present embodiment shifts the screen layout setting back to thedefault setting (i.e., a state in which the screen layout controlsimilar to that shown in FIG. 17C is performed) as shown in (A) of FIG.18A regardless of the descriptive contents of the LCT, and controls thescreen layout to display the EPG screen on the entire screen. Further,when the user gives an instruction to end the display of the EPG screen,the broadcast receiving apparatus 100 executes again the screen layoutcontrol in accordance with the descriptive contents of the LCT.

By performing the control described above, the EPG screen can bedisplayed in a large size and easiness to see the EPG screen can beimproved, compared to the case where the EPG screen is displayed whilemaintaining the control of screen layout region as shown in (B) of FIG.18A.

Note that the exceptional process of the screen layout control isapplied not only to the case of displaying the EPG screen but also tothe case of displaying sub-screens of various setting screens (timerrecording setting screen in the example of (A) of FIG. 18B) ordisplaying dual screens in the broadcast receiving apparatus 100, asshown in FIG. 18B.

In the case of the timer recording setting screen shown in (A) of FIG.18B, a display area of broadcasting contents is shifted from thefull-screen region to a sub-screen region on the right bottom corner ofthe screen. In the case of the dual screen display shown in (B) of FIG.18B, the display area of broadcasting contents is shifted from thefull-screen region to a divided screen region in the middle left side ofthe screen. In both cases, since the display area for displayingbroadcasting contents is narrowed, compared to the case of using theentire screen, it is not preferable to maintain the control of screenlayout region in the display area (that is, a plurality of broadcastingcontents is kept displayed simultaneously in divided regions) from theviewpoint of offering fine visibility. For this reason, in theabove-described situation, the broadcast receiving apparatus 100 of thepresent embodiment selects the broadcasting contents of the “region 0”and displays only the selected contents in the display area. Note thatthe broadcasting contents of the “region 1” or “region 2” may beselected and displayed depending on a region selection state rightbefore the selection.

By performing the control described above, the easiness to see thebroadcasting contents can be improved, compared to the case wherevarious broadcasting contents are displayed while maintaining thecontrol of screen layout region. The same applies also to the cases ofdisplaying a sub-screen for a timer recording program list, displayinginternet contents on a browser, and others.

[Aspect Ratio Converting Process of Video Signal]

In an aspect ratio for a video signal in television broadcastingservice, there are “21:9” suitable for movie contents and the like inaddition to “4:3” that has been used in conventional SDTV and “16:9”that is being used in recent HDTV. In the broadcasting system accordingto the present embodiment, information on the aspect ratio of the videosignal may be described by the video component descriptor. FIG. 19Ashows one example of a data structure of the video component descriptor.In FIG. 19A, a “video_aspect_ratio” parameter is information regardingthe aspect ratio of the video signal. FIG. 19B shows one example ofmeanings of the “video_aspect_ratio” parameter.

A different aspect ratio from those shown in FIG. 19B may further beassigned.

On the other hand, an aspect ratio of a display unit for televisionreceiver (the broadcast receiving apparatus 100 according to the presentembodiment or the like) that can receive the television broadcastingservice is generally “16:9”. Namely, when video contents whose aspectratio is “4:3” or “21:9” are to be displayed on a common televisionreceiver, an aspect ratio converting process may be executed.

Whether the aspect ratio converting process is to be executed or not maybe determined by comparing specification of the monitor unit 162 in thebroadcast receiving apparatus 100 with the “video_aspect_ratio”parameter of the video component descriptor.

For example, in a case where the aspect ratio of the monitor unit 162 inthe broadcast receiving apparatus 100 is “16:9” (3840 horizontalpixels×2160 vertical pixels, or the like) and a value of the“video_aspect_ratio” parameter is “0”, “2”, or “3”, the aspect ratioconverting process may not be executed. On the other hand, in a casewhere the aspect ratio is “16:9” and the value of the“video_aspect_ratio” parameter is “1” or “5”, the aspect ratioconverting process may be executed. Further, for example, in a casewhere the aspect ratio of the monitor unit 162 in the broadcastreceiving apparatus 100 is “21:9” (5040 horizontal pixels×2160 verticalpixels, or the like) and the value of the “video_aspect_ratio” parameteris “0” or “5”, the aspect ratio converting process may not be executed.On the other hand, in a case where the aspect ratio is “21:9” and thevalue of the “video_aspect_ratio” parameter is “1”, “2”, or “3”, theaspect ratio converting process may be executed.

FIG. 19C and FIG. 19D show one example of the aspect ratio convertingprocess in a case where the aspect ratio of the monitor unit 162 in thebroadcast receiving apparatus 100 is “16:9” and the value of the“video_aspect_ratio” parameter is “5”. In a case where video contentswith an aspect ratio of “21:9” are displayed on the monitor unit 162with an aspect ratio of “16:9”, the aspect ratio may be converted into“16:9” by adding black zones to upper and lower portions of the videocontents with the aspect ratio of “21:9” (display A in FIG. 19C). Inthis manner, the whole area of original video contents can be displayedwithout distortion. Further, by capturing only a central portion of thevideo contents with the aspect ratio of “21:9”, the captured centralportion may be displayed on the monitor unit 162 (display B in FIG.19C). In this manner, a main portion of the original video contents canbe enlarged and displayed. Further, the central portion may further becaptured by somewhat adding black zones to the upper and lower portionsof the video contents with the aspect ratio of “21:9” (display C in FIG.19C). In this manner, the most portion of the original video contentscan be enlarged and displayed. Further, the whole area may be displayedby compressing right and left end portions of the video contents withthe aspect ratio of “21:9” (display D in FIG. 19D). In this manner, thewhole area of the original video contents can be enlarged, and the mainportion thereof can further be displayed without distortion. Further,the whole area may be displayed by somewhat adding black zones to theupper and lower portions of the video contents with the aspect ratio of“21:9” and further compressing the right and left end portions thereof(display E in FIG. 19D). In this manner, the whole area of the originalvideo contents can be enlarged and displayed with small distortion ofthe right and left end portions thereof.

The user may be allowed to select how the aspect ratio convertingprocess is to be executed by setting of a menu or the like.Alternatively, it may be switched by pressing a predetermined key of theremote controller or the like. Note that the aspect ratio of “21:9”described above contains ones whose aspect ratio substantially becomes“21:9” such as “2.35:1” for a so-called cinema scope. The numericalvalues of other aspect ratios are also similar.

[Display of EPG in Broadcast Receiving Apparatus]

In the broadcasting system of the present embodiment, time-seriesinformation related to events (so-called programs) included in servicesmaking up the broadcasting network is transmitted in the form of MH-EIT.The MH-EIT shown in FIG. 7E is classified into two classes by a table ID(corresponding to a “table_id” parameter in FIG. 7E), and can provideinformation of the current and next events in its own TLV stream andschedule information of events in its own TLV stream. The broadcastreceiving apparatus 100 of the present embodiment refers to the MH-EITand others to identity a service with a service ID (corresponding to the“service_id” parameter in FIG. 7E), thereby acquiring information of thestart time, broadcasting time, and the like of each event to create anEPG screen. Further, the broadcast receiving apparatus 100 can displaythe created EPG screen on the monitor unit 162 by superposing it onvideo information and others in the video synthesizing unit 161.

FIG. 20A is a diagram showing one example of an EPG screen in thebroadcast receiving apparatus 100 of the present embodiment. An EPGscreen 162 a has a matrix form with the vertical axis representing timeand the horizontal axis representing service IDs (channels), anddisplays detailed information of broadcasting programs to be broadcastedin each channel in each time zone. Further, detailed information 162 a 1of each broadcasting program is composed mainly of a title region 162 a2 and a detail description region 162 a 3. Program information and thelike described in an MH-short format event descriptor or an MH-extensionformat event descriptor and distributed may be displayed in the detailedinformation 162 a 1 of each broadcasting program. In a case where volumeof the program information and the like described in each of thedescriptors is large, abbreviated display may be executed during anormal time, and the whole program information may be displayed bypop-up at the time of selection by an operation of the remote controller(not shown in the drawings). Alternatively, at the time of theselection, the program information and the like described in each of thedescriptors may be transmitted to the portable information terminal 700that is being cooperated with the broadcast receiving apparatus 100, andthe portable information terminal 700 may be instructed so as to displaythem on the display unit 741.

In the title region 162 a 2 in the detailed information 162 a 1 of eachof the broadcasting programs, symbols and others expressing the titleand properties of the broadcasting program are displayed. The symbolsand others expressing the properties of the broadcasting program are,for example, symbols/characters indicating that the broadcasting programis a new program or rerun program, or may be a mark or the like standingfor “data” indicating that the program supports data broadcasting by abroadcasting service, or may be a mark 162 a 4 or the like standing for“Network” indicating that contents, applications, and others related tothe broadcasting program can be acquired through the network. Inaddition, the symbols and others expressing the properties of thebroadcasting program may be substituted by differentiating thebackground color of the detailed information 162 a 1 from others orenclosing the display region of the detailed information 162 a 1 with athick line.

Note that, even when control information (messages, tables, descriptors,etc.) in the broadcasting system of the present embodiment indicatesthat contents, applications, and others related to the broadcastingprogram can be acquired through the network, if access to server deviceson the network cannot be made for such a reason that a LAN cable is notconnected to the LAN communication unit 121 of the broadcast receivingapparatus 100, the screen may be controlled so as not to display themark 162 a 4 or the like standing for “NetWork”.

In addition, when the broadcasting program is a network-distributionprogram distributed through the Internet 200 and therefore cannot beacquired from broadcast waves, and further the broadcast receivingapparatus 100 cannot access server devices on the network like in thecase described above, the screen may be controlled so that a region ofdetailed information 162 b 1 displayed on an EPG screen 162 b is grayedout as shown in FIG. 20B. Namely, the screen is controlled so as not todisplay detailed information of a network-distribution program that theuser is not allowed to view. Alternatively, the gray-out process may besubstituted by differentiating the background color of the detailedinformation 162 b 1 from others. Alternatively, a message such as “Thisprogram cannot be viewed” may be displayed in the detail descriptionregion 162 a 3 of the network-distribution program. It is also possibleto notify the user that the broadcast receiving apparatus 100 isincapable of accessing server devices on the network or the user is notallowed to view a network-distribution program associated with thedetailed information 162 b 1, by a popup message or the like when theuser operates the remote controller (not shown) to select the detailedinformation 162 b 1.

Through the control described above, the broadcast receiving apparatus100 can provide the user with information of broadcasting programs in aform that does not give any sense of discomfort to the user inaccordance with the network connection state.

FIG. 20C is a diagram showing another example of the EPG screen in thebroadcast receiving apparatus 100 of the present embodiment. In FIG.20C, “M1 television”, “M2 broadcasting”, “M3 channel”, “M4 TV”,“Television M5”, and others are the names of broadcast stations ofrespective channels, and the “M2 broadcasting” station providesbroadcasting programs distributed through broadcast waves as well asnetwork-distribution programs (information 162 c 1 indicated in a columnof “network broadcasting” in FIG. 20C) distributed through the Internet200 at the same time.

As shown in FIG. 20C, when a channel that provides only thenetwork-distribution programs distributed through the Internet 200 ispresent, the screen is usually controlled to display the information ofall the channels (including the information 162 c 1) as shown by an EPGscreen 162 c in (A) of FIG. 20C. On the other hand, in the case wherethe broadcast receiving apparatus 100 cannot access server devices onthe network or the like, the screen may be controlled so as not todisplay information of the channel of “M2 broadcasting (networkbroadcasting)” that provides only the network-distribution programsdistributed through the Internet 200 (information 162 c 1 in (A) of FIG.20C) as shown by an EPG screen 162 d in (B) of FIG. 20C.

Through the control described above, it becomes unnecessary for the userof the broadcast receiving apparatus 100 to check the information of achannel that provides programs that the user is not allowed to view.

[Display of Emergency Warning Broadcasting in Broadcast ReceivingApparatus]

The broadcast receiving apparatus 100 of the present embodiment canperform a process of receiving emergency warning broadcasting when anemergency warning broadcasting start control signal bit of a TMCCsignal, which is included in transmission data including a TLV stream,changes from “0” to “1”.

The emergency warning broadcasting may be provided as a broadcastingprogram of a dedicated channel (service ID), or may be provided as anapplication that displays a warning message on the full-screen scale ormay be provided as character information in the form of a captionmessage. It is preferable that the character information in the form ofa caption message is displayed regardless of the condition of thebroadcast receiving apparatus 100 just before reception of the emergencywarning broadcasting in a case where the emergency warning broadcastingis provided as character information in the form of a caption message.Namely, as shown in FIG. 21, when the broadcast receiving apparatus 100receives emergency warning broadcasting in a state where the user viewsa regular broadcasting program by watching a program screen 162 e of thebroadcasting program displayed on the monitor unit 162, characterinformation 162 e 1 by the emergency warning broadcasting is superposedand displayed on the program screen 162 e. In the same manner, when thebroadcast receiving apparatus 100 receives emergency warningbroadcasting in a state where an EPG screen 162 f is displayed on themonitor unit 162 in accordance with an instruction given by the user todisplay the EPG screen, character information 162 f 1 by the emergencywarning broadcasting is superposed and displayed on the EPG screen 162f.

Through the control described above, even when the user selects an EPGscreen, a setting screen, a timer recording program list screen, or aninternet browser screen and causes the broadcast receiving apparatus 100to display such a screen, it is possible to avoid overlooking importantcharacter information based on the received emergency warningbroadcasting. Note that this control may be performed for the characterinformation of an ordinary caption other than the emergency warningbroadcasting.

Further, in a case where the emergency warning broadcasting is providedas the broadcasting program of the dedicated channel (service ID), thechannel (service ID) for the emergency warning broadcasting may beselected automatically regardless of a channel (service ID) of acurrently viewing program. Further, in a case where the emergencywarning broadcasting is provided as the broadcasting program of thededicated channel (service ID) or an application, the broadcastingprogram of the emergency warning broadcasting or the application may bedistributed to external mobile terminal equipment that is cooperatedwith the broadcast receiving apparatus 100 (in the present embodiment,the portable information terminal 700 and the like) by means of controlof the cooperating function executing unit 1103.

Further, in a case where a power source for the broadcast receivingapparatus 100 is not turned on at the time of delivery of the emergencywarning broadcasting, the broadcast receiving apparatus 100 may executecontrol to turn on the power source thereof automatically.Alternatively, the broadcast receiving apparatus 100 may execute controlso that notification that the emergency warning broadcasting is startedis transmitted to the portable information terminal 700 that has ahistory of a cooperated operation with the broadcast receiving apparatus100.

In the broadcast receiving apparatus 100 according to the presentinvention, the control described above allows to avoid the user fromoverlooking display of a video of an important broadcasting program orapplication based on the emergency warning broadcasting.

[Exceptional Process of Display Control]

The broadcast receiving apparatus 100 according to the presentembodiment may execute an exceptional process as follows in a case wheredata transmitted through a path other than the TLV stream of each ofdata constituting the same package cannot be acquired, for example.

As described above with reference to FIG. 7A, in the broadcasting systemcompatible with the broadcast receiving apparatus 100 according to thepresent embodiment, data acquired from the TLV stream and data acquiredfrom a path other than the TLV stream can be contained in the samepackage on the basis of the location information stored in the MPT (seeFIG. 7C). However, data transmitted through a data transmission pathother than the TLV stream, which is indicated by the locationinformation, (for example, the IPv4 data flow or the IPv6 data flow ofthe communication line, MPEG2-TS for broadcast, or the like) are datathat are acquired by other receiving function than the receivingfunction for the TLV/MMT streams. Therefore, even though the broadcastreceiving apparatus 100 is operating, there are situations that datacannot be acquired through these transmission paths, such as a situationthat the receiving function of these transmission paths does notoperate, a situation that the receiving function itself is operating buta relay apparatus or the like on the transmission path does not operate,a situation that wired or wireless connection of these transmissionpaths is not made, or a situation that the broadcast receiving apparatus100 is installed in an environment that these transmission paths cannotbe connected at all.

Under such a situation, in a case where an event indicating that thelocation information stored in the MPT is associated so as to containthe data acquired from the TLV stream and the data acquired from thepath other than the TLV stream in the same package is received, thebroadcast receiving apparatus 100 according to the present embodimentmay execute operations as follows.

For example, in a case where the LCT sets a plurality of regions in ascreen as shown in FIG. 17D and FIG. 17E and is associated so thatprogram video based on the data acquired from the TLV stream isdisplayed in the “region 0” and contents based on the data acquired fromthe transmission path other than the TLV stream are displayed in “region1” and/or “region 2” and the data to be displayed in “region 1” and/or“region 2” cannot be acquired through the transmission path other thanthe TLV stream, layout display of plural regions specified by the LCTmay be prohibited. Specifically, even though the LCT is received, astate that the program video based on the data acquired from the TLVstream is displayed in the “region 0” of the default layout displayshown in FIG. 17C may be held, and the broadcast receiving apparatus 100may not shift to layout display for plural regions as shown in FIG. 17Dor FIG. 17E. Further, even though a change instruction from the defaultlayout to the layout indicated by the LCT is further inputted into theoperation input unit 170 of the broadcast receiving apparatus 100 inthis state, the default layout display shown in FIG. 17C may be held, orthe broadcast receiving apparatus 100 may not shift to the layoutdisplay for the plural regions as shown in FIG. 17D or FIG. 17E byswitching to another data broadcasting screen.

Further, as another operation example in a case where the LCT sets aplurality of regions in a screen as shown in FIG. 17D and FIG. 17E andis associated so that program video based on the data acquired from theTLV stream is displayed in the “region 0” and contents based on the dataacquired from the transmission path other than the TLV stream aredisplayed in “region 1” and/or “region 2” and the data to be displayedin “region 1” and/or “region 2” cannot be acquired through thetransmission path other than the TLV stream, a display frame of theplural regions indicated by the LCT as shown in FIG. 17D or FIG. 17E maybe displayed temporarily, and the background color or a predeterminedstill image may be displayed in “region 1” or “region 2”. In a casewhere the data cannot be acquired through the transmission path otherthan the TLV stream indicated by the location information of the MPTeven though a given time elapses, display switching to return to thestate of the default layout display shown in FIG. 17C may be executed.In this case, it is preferable that at the time of change from thelayout shown in FIG. 17C to the layout shown in FIG. 17D or FIG. 17E andat the time of change from the layout shown in FIG. 17D or FIG. 17E tothe layout shown in FIG. 17C, the broadcast receiving apparatus 100operates so that the program video based on the data acquired from theTLV stream is continuously displayed in the “region 0” of each of thelayouts. This is because viewing of the program video by the user can becontinued.

Further, when the data to be displayed in “region 1” or “region 2”cannot be acquired through the transmission path other than the TLVstream and it thereby becomes a state that the program video based onthe data acquired from the TLV stream is displayed in the “region 0” ofthe default layout display shown in FIG. 17C, by starting operations ofvarious communicating functions or various receiving functions in thebroadcast receiving apparatus 100 according to the present embodiment orchanging a communication environment and/or a communication situation ofthe various communication function or a reception environment and/or areception situation of the various receiving function, the broadcastreceiving apparatus 100 may become a situation that the data to bedisplayed in “region 1” or “region 2” can be acquired through thetransmission path other than the TLV stream. In this case, the broadcastreceiving apparatus 100 according to the present embodiment mayimmediately switch from the default layout display shown in FIG. 17C tothe layout of the plural regions indicated by the LCT as shown in FIG.17D or FIG. 17E. Further, the broadcast receiving apparatus 100 mayswitch so that the program video based on the data acquired from the TLVstream is displayed in the “region 0” and the contents based on the dataacquired from the transmission path other than the TLV stream aredisplayed in “region 1” or “region 2”. Alternatively, the broadcastreceiving apparatus 100 may not execute the layout change immediately,and may execute the layout change after the change instruction from thedefault layout to the layout indicated by the LCT is inputted from theoperation input unit 170. In this case, it is preferable to inform theuser that the layout change becomes possible by means of OSD display orthe like.

[Copyright Protecting Function]

In the digital broadcasting system compatible with the broadcastreceiving apparatus 100 according to the present embodiment, bytransmitting the copy control information so as to be contained in theMPT or the like, a copy control state for contents to which the MPT orthe like refers may be indicated. The copy control state includes“freely copiable” (which may be divided into two types such as “freelycopiable and requiring an encrypting process at the time of accumulationand output” and “freely copiable and not requiring the encryptingprocess at the time of accumulation and output”), “copiable only for onegeneration”, “copiable given times” (for example, a so-called “dubbing10” if copiable nine times+allowing move once), and “copy prohibited”,for example. In this case, the broadcast receiving apparatus 100according to the present embodiment may be configured so as to control,in accordance with the copy control information, an accumulating processof the contents to the storage (accumulation) unit 110, a recordingprocess to a removable recording medium, an outputting process toexternal equipment, a copying process to external equipment, a movingprocess to external equipment, and the like.

Note that a target of the accumulating process may include not only thestorage (accumulation) unit 110 in the broadcast receiving apparatus100, but also the removable recording medium and the external equipmentthat is subjected to a protecting process such as the encrypting processso that contents accumulated therein can be reproduced only by thebroadcast receiving apparatus 100. Specifically, for example, one set toa state that the one can be recorded or reproduced only by the broadcastreceiving apparatus 100 among external recording apparatuses such as anHDD connected to the extension interface unit 124 is included.

<Contents Copy Control>

A concrete example of a process of contents copy control based on thecopy control information will be described below.

First, in a case where the copy control information contained in the MPTor the like indicates “freely copiable”, the broadcast receivingapparatus 100 according to the present embodiment may execute theaccumulating process to the storage (accumulation) unit 110, therecording process to a removable recording medium, the outputtingprocess to external equipment, the copying process to externalequipment, the moving process to external equipment, and the likewithout any limitation. However, in a case where the control based onthe copy control information is divided into “freely copiable andrequiring an encrypting process at the time of accumulation and output”and “freely copiable and not requiring the encrypting process at thetime of accumulation and output” and indicates “freely copiable andrequiring an encrypting process at the time of accumulation and output”,the broadcast receiving apparatus 100 can execute the accumulatingprocess to the storage (accumulation) unit 110, the recording process toa removable recording medium, the outputting process to externalequipment, the copying process to external equipment, and the movingprocess to external equipment without any limitation, but it isnecessary to apply the encrypting process to the target in any case.

Further, in a case where the copy control information contained in theMPT or the like indicates “copiable only for one generation”, thebroadcast receiving apparatus 100 according to the present embodimentmay be allowed to execute an accumulating process to the storage(accumulation) unit 110 after encryption, and a recording process to aremovable recording medium that is subjected to the protecting processsuch as the encrypting process so that contents can be reproduced onlyby the broadcast receiving apparatus 100. Further, in a case wherecontents after accumulation is outputted to external equipment forviewing, the contents are encrypted and outputted together with the copycontrol information of “copy prohibited”. Further, the so-called movingprocess to external equipment (a process of copying the contents toexternal equipment, and disenabling reproduction by a deleting processof the contents from the storage (accumulation) unit 110 or the like ofthe broadcast receiving apparatus 100) can be executed.

Further, in a case where the copy control information contained in theMPT or the like indicates “copiable given times”, the broadcastreceiving apparatus 100 according to the present embodiment may beallowed to execute the accumulating process to the storage(accumulation) unit 110 after encryption, and the recording process tothe removable recording medium that is subjected to the protectingprocess such as the encrypting process so that contents can bereproduced only by the broadcast receiving apparatus 100. Further, in acase where contents after accumulation is outputted to externalequipment for viewing, the contents are encrypted and outputted togetherwith the copy control information of “copy prohibited”. Further, thebroadcast receiving apparatus 100 may be allowed to execute the copyingprocess and the moving process to external equipment the predeterminednumber of times defined in advance. In a case where a so-called “dubbing10” is defined, the broadcast receiving apparatus 100 can execute thecopying process to external equipment nine times and the moving processto external equipment once.

Further, in a case where the copy control information contained in theMPT or the like indicates “copy prohibited”, the broadcast receivingapparatus 100 according to the present embodiment prohibits the contentsfrom being accumulated (or copied) to the storage (accumulation) unit110 or the like. However, the broadcast receiving apparatus 100 may beconfigured so as to have a “temporary accumulation” mode in which thecontents can be held to the storage (accumulation) unit 110 or the likeonly for a given time defined in advance or a given time specified bythe control information (for example, by the MH-Expire descriptor, thecontents usage control descriptor, or the like) contained inbroadcasting signal. In this case, even in a case where the copy controlinformation contained in the MPT or the like indicates “copyprohibited”, the broadcast receiving apparatus 100 can temporarily holdthe contents to the storage (accumulation) unit 110 or the like. In acase where the contents, for which the copy control informationcontained in the MPT or the like indicates “copy prohibited”, are to beoutputted to external equipment for viewing, the contents are encryptedand outputted together with the copy control information for “copyprohibited”.

Note that output to external equipment for viewing described above maybe executed through the video output unit 163 and the audio output unit166 of the broadcast receiving apparatus 100 according to the presentembodiment, or via the digital interface unit 125, the LAN communicationunit 121, and the like. The copying process or the moving process toexternal equipment described above may be executed via the digitalinterface unit 125, the LAN communication unit 121, and the like.

FIG. 22A shows one example of a data structure of the contents copycontrol descriptor in the broadcasting system according to the presentembodiment. In FIG. 22A, a “digital recording control data” parameter isdigital copy control information, and indicates information forcontrolling copy generation of contents. Further, FIG. 22B shows oneexample of parameter values of the digital copy control information andtheir meanings. For example, in a case where the parameter is “00”, itindicates “freely copiable”. Ina case where the parameter is “01”,definition by the provider is allowed. In a case where the parameter is“10”, it indicates “copiable only for one generation”. In a case wherethe parameter is “11”, it indicates “copy prohibited”. Further, FIG. 23shows one example of a data structure of the contents usage controldescriptor in the broadcasting system according to the presentembodiment. A “copy restriction mode” parameter in FIG. 23 is a copyrestriction mode, and indicates whether copy for which the number ofcopies is restricted can be executed or not.

In the broadcast receiving apparatus 100 according to the presentinvention, in a case where the digital copy control information is “01”,the accumulating process in which copy can be executed the predeterminednumber of times defined by a broadcaster in advance can be executed.Alternatively, in a case where the digital copy control information isnot “11” and the copy restriction mode indicates that the copy for whichthe number of copies is restricted is allowed, the broadcast receivingapparatus 100 may be allowed to execute the accumulating process inwhich copy can be executed the predetermined number of times defined bythe broadcaster in advance. Alternatively, in this case, the number ofcopiable times for each content may be specified by using a part or allof a “reserved_future_use” parameter in a digital contents usagedescriptor.

Through the process described above, the broadcast receiving apparatus100 according to the present embodiment can realize the contents copycontrol for the “copiable given times” described above.

Further, in a case where a “retention_mode” parameter in the contentsusage control descriptor shown in FIG. 23 is a temporary accumulationcontrol bit and the digital copy control information indicates “copyprohibited”, the “retention_mode” parameter indicates whether temporaryaccumulation of target content is permitted or not. Further, a“retention_state” parameter is a temporary accumulation permissibletime, and indicates the temporary accumulation permissible time in acase where the temporary accumulation permissible bit permits thetemporary accumulation of the target content.

In the broadcast receiving apparatus 100 according to the presentinvention, by referring information on each of the temporaryaccumulation control bit and the temporary accumulation permissibletime, advisability of the temporary accumulation in a case where thedigital copy control information of each content indicates “copyprohibited” and an accumulation time thereof can be controlled.

According to the processes described above, proper contents protectioncan be achieved in accordance with the copy control informationcorrelated with contents.

<Contents Output Control>

Next, a concrete example of a process of output control of contents toexternal equipment will be described below.

In the contents usage control descriptor shown in FIG. 23, an“image_constraint_token” parameter is a resolution limit bit, andindicates that image quality limit is to be required or not whencontents are outputted to external equipment. In a case where theresolution limit bit indicates that the image quality limit is to berequired, the broadcast receiving apparatus 100 according to the presentembodiment executes the image quality limit for the target content whenthe target content is outputted to external equipment. Note that theimage quality limit may not be required when the target content isaccumulated to the storage (accumulation) unit 110 or the like. In theimage quality limit, for example, received (or accumulated) UHD (7680pixels×4320 pixels) video contents are converted into SHD (3840pixels×2160 pixels) video and then outputted, or an HD (1920 pixels×1080pixels) video is converted into an SD (640 pixels×480 pixels) video andthen outputted. Note that to what extent should the image quality limitof the target content be executed, that is, to what resolution an imagequality of the target content is converted after the image quality limitmay be specified by using a part or all of the “reserved_future_use”parameter of the digital contents usage descriptor.

In the similar manner as described above, for example, a frame ratelimit bit or a pixel resolution power limit bit may be prepared by usinga part or all of the “reserved_future_use” parameter, and limit of aframe rate or limit of pixel resolution power may be controlled when thecontents are outputted to external equipment. In a case where the framerate limit bit indicates that the limit of the frame rate is required,the broadcast receiving apparatus 100 according to the presentembodiment executes the limit of the frame rate of the target contentwhen the target content is outputted to the external equipment. Forexample, video contents with a frame rate of 120 Hz are converted intocontents with a frame rate of 60 Hz, and then outputted. Further, in acase where the pixel resolution power limit bit indicates that the limitof the pixel resolution power is required, the broadcast receivingapparatus 100 according to the present embodiment executes the limit ofresolution power of each pixel of the target content when the targetcontent is outputted to the external equipment. For example, each pixelof video contents in which each pixel is constituted by 12 bits isconverted into 8 bits, and then outputted.

Moreover, a resolution limit control flag, a frame rate limit controlflag or a pixel resolution power limit control flag may be prepared byusing a part or all of the “reserved_future_use” parameter, and whetherthe image quality limit, the frame rate limit or the pixel resolutionpower limit is to be executed or not may be controlled in accordancewith the resolution limit control flag, the frame rate limit controlflag, or the pixel resolution power limit control flag. For example,control may be executed so that the image quality limit is not executedin a case where the resolution limit control flag indicates thatresolution limit control is executed in accordance with interfacespecification and an interface through which the target content isoutputted includes a predetermined content protection technology. On theother hand, the control may be executed so that the image quality limitis executed in a case where the interface does not include thepredetermined content protection technology in such a situation.

Specifically, for example, in a case where the digital interface unit125 is an HDMI interface and the target content is outputted to externalequipment connected to the HDMI interface and an HDMI interface includedin the external equipment is compliant with HDCP (High-bandwidth DigitalContent Protection) since version 2.2, the image quality limit is notexecuted, but output of the target content is executed. On the otherhand, in a case where the version of HDCP of the HDMI interface in theexternal equipment is before 2.2 in such a situation, the image qualitylimit is executed and the output of the target content is also executed.Namely, whether the image quality limit for the target content is to beexecuted or not may be controlled in accordance with whether theinterface through which the target content is outputted includes thepredetermined content protection technology defined in advance or not.Alternatively, in a case where the interface includes the contentprotection technology, whether the image quality limit for the targetcontent is to be executed or not may be controlled in accordance withthe version of the content protection technology. In a case where theresolution limit control flag does not indicate that the resolutionlimit control is to be executed in accordance with the interfacespecification, presence or absence of the image quality limit may becontrolled in accordance with only the resolution limit bit. Withrespect to the frame rate limit control flag or the pixel resolutionpower limit control flag, the similar processes thereto may be executed.

Further, the copying process of the contents for which the copy controlinformation described above indicates copy limitations such as “copiableonly for one generation”, “copiable given times”, and “copy prohibited”to external equipment through the LAN communication unit 121 may beallowed only when the IP address of the external equipment which is thedestination of a transmission packet sent from the broadcast receivingapparatus 100 is present in the same subnet as the IP address of thebroadcast receiving apparatus 100, and may be prohibited when the IPaddress of the external equipment is outside the subnet in which the IPaddress of the broadcast receiving apparatus 100 is present. The sameapplies also to the case of the contents for which the copy controlinformation indicates “freely copiable and requiring encoding processupon storage and output”.

Similarly, the moving process, the copying process, and the like toexternal equipment through the LAN communication unit 121 after storingthe contents for which the copy control information described aboveindicates copy limitations such as “copiable only for one generation”,“copiable given times”, and “freely copiable and requiring encodingprocess upon storage and output” temporarily in the storage(accumulation) unit 110 may be allowed only when the IP address of theexternal equipment which is the destination of a transmission packetsent from the broadcast receiving apparatus 100 is present in the samesubnet as the IP address of the broadcast receiving apparatus 100, andmay be prohibited when the IP address of the external equipment isoutside the subnet in which the IP address of the broadcast receivingapparatus 100 is present.

Further, video and audio output for viewing contents stored in thestorage (accumulation) unit 110 of the broadcast receiving apparatus 100is allowed in principle only when the IP address of the externalequipment which is the destination of a transmission packet sent fromthe broadcast receiving apparatus 100 is present in the same subnet asthe IP address of the broadcast receiving apparatus 100, and the outputis prohibited when the IP address of the external equipment is outsidethe subnet in which the IP address of the broadcast receiving apparatus100 is present. However, when the external equipment is connected withina given period in the subnet in which the IP address of the broadcastreceiving apparatus 100 is present and is registered (by paring) asequipment allowed to view the contents even outside the subnet in whichthe IP address of the broadcast receiving apparatus 100 is present,video and audio output for viewing the contents stored in the storage(accumulation) unit 110 of the broadcast receiving apparatus 100 to theexternal equipment may be allowed even when the IP address of theexternal equipment is outside the subnet in which the IP address of thebroadcast receiving apparatus 100 is present. In this case, the videoand audio output for viewing the contents is performed by encoding thecontents.

However, the encrypting process may be controlled in accordance with avalue of an “encryption_mode” parameter in the contents usage controldescriptor shown in FIG. 23. Namely, in a case where the value of the“encryption_mode” parameter indicates that output protection for IPinterface output is required, the encrypting process may be executed. Onthe other hand, in a case where it indicates that the output protectionfor the IP interface output is not required, video output and audiooutput for the viewing may be executed without executing the encryptingprocess. Alternatively, in a case where the value of the“encryption_mode” parameter indicates that the output protection for theIP interface output is required, a range of the IP address of theexternal equipment in which the video output and the audio output forthe viewing can be executed without being subjected to the encryptingprocess may be specified by using a part or all of the“reserved_future_use” parameter of the contents usage controldescriptor. Namely, with respect to the predetermined IP address definedin advance, even though the IP address is not positioned in the samesubnet as the IP address of the broadcast receiving apparatus 100, it ispossible to execute the video output and the audio output for theviewing.

Further, by using a part or all of the “reserved_future_use” parameterof the contents usage control descriptor, a period of time in which aregistering process (pairing) becomes effective may be specified. Inthis case, in a case where date and time when the registering process(pairing) for external equipment was executed are within the specifiedperiod of time, the broadcast receiving apparatus 100 may control sothat video output and audio output for viewing are permitted withrespect to the external equipment even though the external equipment ispositioned outside the same subnet of the IP address of the broadcastreceiving apparatus 100. Ina case where the date and time are outsidethe specified period of time, the broadcast receiving apparatus 100 maycontrol so that they are not permitted.

Further, the moving process, the copying process, the outputting processand the like of contents to external equipment through the LANcommunication unit 121 as described above may be controlled inaccordance with a value of a “remote_view_mode” parameter in thecontents usage control descriptor. Namely, in a case where the value ofthe “remote_view_mode” parameter indicates that remote viewing of thetarget content is not permitted, the broadcast receiving apparatus 100may control so that all of the moving process, the copying process, theoutputting process and the like of contents to the external equipmentthrough the LAN communication unit 121 are prohibited.

According to the processes described above, it is possible to realizeappropriate content protection when the contents are outputted to theexternal equipment.

<First Exceptional Process of Contents Copy Control>

In the data structure of the contents copy control descriptor shown inFIG. 22A, first digital copy control information (the“digital_recording_control_data” parameter positioned immediately after“descriptor_length”) is control information for copy generationregarding the whole contents, while second digital copy controlinformation (the “digital_recording_control_data” parameter positionedimmediately after “component_tag”) is control information for copygeneration regarding each of components constituting the contents. Notethat specification of each of the components is made by a“component_tag” parameter.

In the broadcasting system according to the present embodiment, in acase where control of copy generation of the whole contents (program) isexecuted, only the first digital copy control information is describedin the contents copy control descriptor, and the control of the copygeneration is executed by the first digital copy control information. Onthe other hand, in a case where the control of the copy generation isexecuted for each of components constituting the contents, both thefirst digital copy control information and the second digital copycontrol information are described in the contents copy controldescriptor, and the control of the copy generation is executed.Moreover, in a case where the control of the copy generation is executedfor each of components constituting the contents, a situation is thoughtthat the first digital copy control information described in thecontents copy control descriptor does not coincide with description ofthe second digital copy control information. In the situation describedabove, the broadcast receiving apparatus 100 according to the presentembodiment may execute operations as described below.

First, a first operation example is a method of executing control sothat the broadcast receiving apparatus 100 operates on the basis of copygeneration control indicated by the first digital copy controlinformation in a case where description of the first digital copycontrol information does not coincide with description of the seconddigital copy control information. In this case, simple copy generationcontrol common to each of components constituting the same contentsbecomes possible.

Next, a second operation example is a method of executing control sothat the broadcast receiving apparatus 100 operates on the basis of copygeneration control indicated by the second digital copy controlinformation in a case where the description of the first digital copycontrol information does not coincide with the description of the seconddigital copy control information. In this case, different copygeneration control can be made for each of the components even thoughthe components are components constituting the same contents, that is,more precise copy generation control becomes possible.

Moreover, a third operation example is a method of executing control sothat the broadcast receiving apparatus 100 operates on the basis ofdigital copy control information having a stricter condition of twodifferent types of digital copy control information in a case where thedescription of the first digital copy control information does notcoincide with the description of the second digital copy controlinformation. For example, in a case where one is “freely copiable” andthe other is “copiable only for one generation”, the operation is madein accordance with information with “copiable only for one generation”.Alternatively, in a case where one is “copiable given times” and theother is “copy prohibited”, the operation is made in accordance withinformation with “copy prohibited”. Alternatively, in a case where bothare “copiable given times”, the operation is made in accordance withinformation for which the number of copiable times, which is separatelyspecified, is smaller. In this case, it is possible to control copygeneration more exactly.

By executing the processes described above, in the broadcast receivingapparatus 100 according to the present invention, it becomes possible tosuitably operate even in a case where two different types of digitalcopy control information are described in the contents copy controldescriptor.

<Second Exceptional Process of Contents Copy Control>

As described above by using FIG. 7A, in the digital broadcasting systemcompatible with the broadcast receiving apparatus 100 of the presentembodiment, data that is acquired from a path (IPv4, IPv6, MPEG2-TS,URL, etc.) different from data that is acquired from a TLV stream of thebroadcasting path may be included in the same package and the same eventas the data that is acquired from the TLV stream based on the locationinformation (see FIG. 7C) in the MTP or the like. The contentsprotection that is performed when copy control information is includedin the MPT in this case will be described.

First, when copy control information is included in the MPT or the like,data that is included in the same package and the same event based onthe location information may be controlled in accordance with the copycontrol information included in the TLV stream even if the data isacquired from a path (IPv4, IPv6, MPEG2-TS, URL, etc.) different fromdata that is acquired from a TLV stream of the broadcasting path. Asdescribed above, the copy control states of contents specified by thecopy control information include “freely copiable” (which may be dividedinto two types such as “freely copiable and requiring encoding processupon storage and output” and “freely copiable and not requiring encodingprocess upon storage and output”), “copiable only for one generation”,“copiable given times” (e.g., a so-called “dubbing 10” if copiable ninetimes+allowing move once), and “copy prohibited”.

Herein, if data location indicated by the location information includesMPEG2-TS data transmitted by a different digital broadcasting signal,the transmittedMPEG2-TS data is correlated with copy control informationalso in the different digital broadcasting signal. Accordingly, aproblem arises as to in what way and in accordance with whichinformation the copy control of the MPEG2-TS data should be performed(which of the copy control information included in the TLV/MMT streamand the copy control information included in the MPEG2-TS should bereferred to in performing copy control).

In the digital broadcasting system of the present embodiment, thisproblem can be solved by performing any one of the following operationsin the broadcast receiving apparatus 100.

<First Operation example>

In a first operation example, when copy control information is includedin the MPT or the like and data that is included in the same package andthe same event based on the location information includes MPEG2-TS datatransmitted by a different digital broadcasting signal, priority isgiven to a copy control state indicated by the copy control informationincluded in the TLV stream over a copy control state indicated by thecopy control information included in the MPEG2-TS in performing copycontrol.

For example, when the copy control state indicated by the copy controlinformation included in the TLV stream is “copiable only for onegeneration” while the copy control state indicated by the copy controlinformation included in the MPEG2-TS is “copiable given times”, even thedata acquired from a path (digital broadcasting in the MPEG2-TStransmission format) different from the data acquired from the TLVstream may be subjected to copy control as the data contents of“copiable only for one generation”. For example, when the copy controlstate indicated by the copy control information included in the TLVstream is “freely copiable” while the copy control state indicated bythe copy control information included in the MPEG2-TS is “copiable giventimes”, even the data acquired from a path (digital broadcasting in theMPEG2-TS transmission format) different from the data acquired from theTLV stream may be subjected to copy control as the data contents of“freely copiable”.

By this operation, data acquired from a path other than the TLV streamcan also be put in a copy control state desired in the broadcastingsystem compatible with the broadcast receiving apparatus 100 of thepresent embodiment.

<Second Operation Example>

In a second operation example, when copy control information is includedin the MPT or the like and data that is included in the same package andthe same event based on the location information includes MPEG2-TS datatransmitted by a different digital broadcasting signal, a copy controlstate indicated by the copy control information included in the TLVstream is compared with a copy control state indicated by the copycontrol information included in the MPEG2-TS, and if the copy controlstate indicated by the copy control information included in the MPEG2-TSis severer than the copy control state indicated by the copy controlinformation included in the TLV stream, the MPEG2-TS data is excludedfrom contents to be processed when performing the storing process to thestorage (accumulation) unit 110, recording process on the removablerecoding medium, or outputting process from the digital interface.

By this operation, with respect to the data acquired from the path otherthan the TLV stream, the original copy control information of the dataset in the broadcasting system in which the data is transmitted is takeninto account, and also the redundant copy control states on thebroadcast receiving apparatus 100 of the present embodiment can beeliminated.

Further, if the copy control state indicated by the copy controlinformation included in the MPEG2-TS is identical to or less severe thanthe copy control state indicated by the copy control informationincluded in the TLV stream as a result of the above comparison, theMPEG2-TS data that is included in the same package and the same eventbased on the location information may be subjected to copy control ascontents in the copy control state indicated by the copy controlinformation included in the TLV stream.

By this operation, with respect to the data acquired from the path otherthan the TLV stream, the original copy control information of the dataset in the broadcasting system in which the data is transmitted is takeninto account, and the redundant copy control states on the broadcastreceiving apparatus 100 of the present embodiment can be eliminated.

The copy right protection function of the broadcast receiving apparatus100 of the present embodiment has been described as being performedbased on the copy control information included in the MPT. However, theMPT is not the only table including the copy control information. Thecopy control information may be included also in tables other than theMPT such as the MH-service description table (MH-SDT), the MH-eventinformation table (MH-EIT), or other tables shown in FIG. 6B, and thebroadcast receiving apparatus 100 can perform the copy right protectionprocess in accordance with the copy control information transmitted inthese tables.

According to the above-described embodiment, it is possible to provide abroadcasting receiver supporting MMT digital broadcasting.

Second Embodiment

A second embodiment of the present invention will be described below.Constituent elements, processes, effects and the like of the secondembodiment are the same as those of the first embodiment unlessotherwise specified. For this reason, in the following description,differences between the first embodiment and the second embodiment aremainly described, and description of the matters common to bothembodiments is omitted as much as possible in order to avoid redundantdescription. Further, the following description will be made based onthe assumption that a broadcast receiving apparatus of the secondembodiment is a television receiver that supports both of MMT method andMPEG2-TS method as the media transport method.

[Hardware Configuration of Broadcast Receiving Apparatus]

FIG. 24 is a block diagram showing an example of an internalconfiguration of a broadcast receiving apparatus 800. The broadcastreceiving apparatus 800 includes a main control unit 801, a system bus802, a ROM 803, a RAM 804, a storage unit 810, a LAN communication unit821, an extension interface unit 824, a digital interface unit 825, afirst tuner/demodulating unit 831, a second tuner/demodulating unit 832,an MMT decode processing unit 841, an MPEG2-TS decode processing unit842, a video synthesizing unit 861, a monitor unit 862, a video outputunit 863, an audio synthesizing unit 864, a speaker unit 865, an audiooutput unit 866, and an operation input unit 870.

The main control unit 801, the system bus 802, the ROM 803, the RAM 804,the storage unit 810, the extension interface unit 824, the digitalinterface unit 825, the monitor unit 862, the video output unit 863, thespeaker unit 865, the audio output unit 866, the operation input unit870, and the like have functions equivalent to those of the main controlunit 101, the system bus 102, the ROM 103, the RAM 104, the storage(accumulation) unit 110, the extension interface unit 124, the digitalinterface unit 125, the monitor unit 162, the video output unit 163, thespeaker unit 165, the audio output unit 166, the operation input unit170, and the like in the broadcast receiving apparatus 100 of the firstembodiment, respectively, and detail descriptions thereof are omitted.

The first tuner/demodulating unit 831 receives broadcast waves of abroadcasting service adopting the MMT method as the media transportmethod via an antenna (not shown), and tunes to (selects) a channelgiving a service that the user wishes to have, under the control by themain control unit 801. Further, the first tuner/demodulating unit 831demodulates a received broadcasting signal to acquire an MMT datastring, and outputs the MMT data string to the MMT decode processingunit 841. The second tuner/demodulating unit 832 receives broadcastwaves of a broadcasting service adopting the MPEG2-TS method as themedia transport method via an antenna (not shown), and tunes to(selects) a channel giving a service that the user wishes to have, underthe control by the main control unit 801. Further, the secondtuner/demodulating unit 832 demodulates a received broadcasting signalto acquire an MPEG2-TS data string, and outputs the MPEG2-TS data stringto the MPEG2-TS decode processing unit 842.

The MMT decode processing unit 841 receives the MMT data string outputfrom the first tuner/demodulating unit 831, and performs processes ofseparating and decoding a video data string, an audio data string, acaption data string, a subtitle data string, and the like, which arereal-time presentation elements, based on a control signal included inthe MMT data string. The MMT decode processing unit 841 has thefunctions equivalent to those of the separating unit 132, the videodecoder 141, the video color gamut conversion unit 142, the audiodecoder 143, the caption decoder 144, the subtitle decoder 145, thesubtitle synthesizing unit 146, the subtitle color gamut conversion unit147, the data decoder 151, the cache unit 152, the application controlunit 153, the browser unit 154, the application color gamut conversionunit 155, the sound source unit 156, and the like in the broadcastreceiving apparatus 100 of the first embodiment. The MMT decodeprocessing unit 841 is capable of performing the various processesdescribed in the first embodiment. The details of the various processeshave been described in the first embodiment, and further descriptionsthereof are omitted.

The MPEG2-TS decode processing unit 842 receives the MPEG2-TS datastring output from the second tuner/demodulating unit 832, and performsprocesses of separating and decoding a video data string, an audio datastring, a caption data string, a subtitle data string, and the like,which are real-time presentation elements, based on a control signalincluded in the MPEG2-TS data string. The MPEG2-TS decode processingunit 842 has the function equivalent to that of an IRD (IntegratedReviver Decoder) of a conventional television receiver that receivesbroadcast waves of a broadcasting service adopting the MPEG2-TS methodas the media transport method, and detailed descriptions thereof areomitted.

The video synthesizing unit 861 receives video information, subtitleinformation, and application information output from the MMT decodeprocessing unit 841 and video information, subtitle information, andapplication information output from the MPEG2-TS decode processing unit842, and properly performs a selection process and/or a superpositionprocess. The video synthesizing unit 861 has a video RAM (not shown),and the monitor unit 862 and others are driven based on videoinformation and others inputted to the video RAM. In addition, the videosynthesizing unit 861 performs a scaling process, a superposing processof EPG screen information, and others under the control by the maincontrol unit 801 when necessary. The audio synthesizing unit 864receives audio information output from the MMT decode processing unit841 and audio information output from the MPEG2-TS decode processingunit 842, and properly performs a selection process and/or a mixingprocess.

The LAN communication unit 821 is connected to the Internet 200 via therouter device 200 r, and transmits and receives data to and from serverdevices and other communication equipment on the Internet 200. Further,the LAN communication unit 821 acquires an MMT data string (or part ofit) and an MPEG2-TS data string (or part of it) of a program transmittedthrough the communication line, and properly outputs them to the MMTdecode processing unit 841 and the MPEG2-TS decode processing unit.

[Time Display in Broadcast Receiving Apparatus]

The broadcast receiving apparatus 800 of the present embodiment candisplay the current date and current time on the EPG screen and othervarious setting screens. Information related to the current date andcurrent time is transmitted by an MH-TOT or the like in the case of abroadcasting service adopting the MMT method as the media transportmethod, and the information is transmitted by a TOT (Time Offset Table)or the like provided in SI (Service Information) defined in the MPEG-2system in the case of a broadcasting service adopting the MPEG2-TSmethod as the media transport method. The broadcast receiving apparatus800 can acquire the information related to the current date and currenttime by referring to the MH-TOT and the TOT.

In general, when the video synthesizing unit 861 mainly selects videoinformation and others output from the MMT decode processing unit 841,the video synthesizing unit 861 superposes the information related tothe current date and current time acquired from the MH-TOT on the videoinformation and others, and when the video synthesizing unit 861 mainlyselects video information and others output from the MPEG2-TS decodeprocessing unit 842, the video synthesizing unit 861 superposes theinformation related to the current date and current time acquired fromthe TOT on the video information and others.

However, since the broadcasting service adopting the MMT method as themedia transport method is different from the broadcasting serviceadopting the MPEG2-TS method as the media transport method incoding/decoding processes, transmission paths, and the like, there is apossibility that inconsistency occurs in current time display betweenthe case of selecting the broadcasting service adopting the MMT methodas the media transport method and the case of selecting the broadcastingservice adopting the MPEG2-TS method as the media transport method. Forexample, when an EPG screen 162 g displaying channel information of thebroadcasting service adopting the MMT method as the media transportmethod is switched to an EPG screen 162 h displaying channel informationof the broadcasting service adopting the MPEG2-TS method as the mediatransport method as shown in FIG. 25, the inconsistency caused when thedisplay of current time is switched from a current time display 162 g 1to a current time display 162 h 1 may give the user a feeling of visualdiscomfort.

In order to prevent the user from having such a feeling of visualdiscomfort, the broadcast receiving apparatus 800 of the presentembodiment performs control to superpose the information related to thecurrent date and current time acquired from the TOT on the videoinformation and others even when the video synthesizing unit 861 mainlyselects the video information and others output from the MMT decodeprocessing unit 841. Namely, the broadcast receiving apparatus 800 ofthe present embodiment performs control to superpose current timeinformation provided by the broadcasting service adopting the MPEG2-TSmethod as the media transport method, on the contents of thebroadcasting service adopting the MMT method as the media transportmethod.

Through the control described above, the broadcast receiving apparatus800 of the present embodiment always displays the current timeinformation that is acquired by referring to the TOT. Thus, even whenthe broadcasting service adopting the MMT method as the media transportmethod and the broadcasting service adopting the MPEG2-TS method as themedia transport method are switched to each other, it is possible toprevent the user from having such a feeling of visual discomfort due toinconsistency in the display of current time.

FIG. 26A shows one example of selection control of a reference source ofcurrent time information in accordance with the reception state ofbroadcasting services in the broadcast receiving apparatus 800 of thepresent embodiment. The broadcast receiving apparatus 800 of the presentembodiment always refers to the TOT to acquire current time informationwhen the broadcast receiving apparatus 800 is in a condition in which itcan receive the broadcasting service adopting the MPEG2-TS method as themedia transport method, and refers to the MH-TOT to acquire current timeinformation only when the broadcast receiving apparatus 800 is in acondition in which it cannot receive the broadcasting service adoptingthe MPEG2-TS method as the media transport method but can receive thebroadcasting service adopting the MMT method as the media transportmethod.

In addition, the above-mentioned effect can be achieved also byperforming control to superpose current time information provided by thebroadcasting service adopting the MMT method as the media transportmethod on contents of the broadcasting service adopting the MPEG2-TSmethod as the media transport method contrary to the above control.

In both of the case of control in which current time informationprovided by the broadcasting service adopting the MPEG2-TS method as themedia transport method is superposed on contents of the broadcastingservice adopting the MMT method as the media transport method and thecase of control in which current time information provided by thebroadcasting service adopting the MMT method as the media transportmethod is superposed on contents of the broadcasting service adoptingthe MPEG2-TS method as the media transport method, the current timeinformation can be corrected by referring to the “delta” parameter ofthe time information in the TMCC extension information region asdescribed above in [Time Management of Broadcast Receiving Apparatus] ofthe first embodiment.

Further, in both cases of the broadcasting service in which the MMTmethod is adopted as the media transport method and the broadcastingservice in which the MPEG2-TS method is adopted as the media transportmethod, there is a possibility that the MH-TOT or TOT transmitted byrespective broadcasting services making up the network has an error dueto the fault of the transmission system or the transmission failure. Asthe measures for the error of the MH-TOT or TOT described above, thebroadcast receiving apparatus 800 of the present embodiment has afunction of performing an updating process of time information of abuilt-in clock by acquiring an MH-TOT or TOT from a differentbroadcasting service in the same network or an arbitrary broadcastingservice in another network and referring to current time information ofthe acquired MH-TOT or TOT when it is determined that the MH-TOT or TOTacquired from the service being received at present has an error.

FIG. 26B shows one example of an updating process of current timeinformation in the case where the broadcasting service adopting theMPEG2-TS method as the media transport method is received in thebroadcast receiving apparatus 800 of the present embodiment. Note thatthe process similar to that shown in FIG. 26B is possible even when thebroadcasting service adopting the MMT method as the media transportmethod is received.

When the time information of the built-in clock is updated in thebroadcast receiving apparatus 800 of the present embodiment, first, thereceiving function executing unit 1102 acquires the TOT from theMPEG2-TS data string of the currently received broadcasting service(broadcasting serving adopting the MPEG2-TS method as the mediatransport method) (S301), and then acquires the current time informationby referring to the acquired TOT (S302). Next, the receiving functionexecuting unit 1102 performs the process of comparing the current timeinformation acquired in the process of S302 and the time information ofthe built-in clock.

When the difference between the current time information acquired in theprocess of S302 and the time information of the built-in clock is withina given value (e.g., within 3 minutes) as a result of the comparisonprocess (S303: Yes), the receiving function executing unit 1102 updatesthe time information of the built-in clock based on the current timeinformation acquired in the process of S302 (S306). On the other hand,when the difference between the current time information acquired in theprocess of S302 and the time information of the built-in clock is notwithin the given value as a result of the comparison process (S303: No)or the TOT acquired in S301 has a flag or the like indicating that anerror is present in the data, the receiving function executing unit 1102acquires a TOT from an MPEG2-TS data string of a different broadcastingservice in the same network or acquires an MH-TOT from an MMT datastring of an arbitrary broadcasting service (broadcasting servingadopting the MMT method as the media transport method) in anothernetwork (S304), and further acquires current time information from theacquired TOT or MH-TOT (S305). The receiving function executing unit1102 can perform the comparison process of S303 again based on thecurrent time information acquired in the process of S305.

Through the process described above, the broadcast receiving apparatus800 of the present embodiment can perform the updating process of thetime information of the built-in clock by acquiring an MH-TOT or TOTfrom a different broadcasting service in the same network or anarbitrary broadcasting service in another network and referring tocurrent time information of the acquired MH-TOT or TOT when it isdetermined that the MH-TOT or TOT acquired from the service beingreceived at present has an error.

When the current time information whose difference from the timeinformation of the built-in clock falls within a given range cannot beacquired even by the repetition of S304 and S305 like in the initialsetting after the product shipment, the time information of the built-inclock may be set newly based on the current time information acquired inthe process of S302. In this manner, it is possible to deal with thecase where the time information of the built-in clock of the broadcastreceiving apparatus 800 of the present embodiment has an error.

[Display of EPG in Broadcast Receiving Apparatus]

Event schedule information of the broadcasting service adopting the MMTmethod as the media transport method is transmitted by MH-EIT or thelike. On the other hand, event schedule information of the broadcastingservice adopting the MPEG2-TS method as the media transport method istransmitted by EIT (Event Information Table) or the like included in SIdefined in the MPEG-2 system. Therefore, in general, when videoinformation or the like provided by the broadcasting service adoptingthe MMT method as the media transport method is displayed, the eventschedule information (MH-EIT) of the broadcasting service adopting theMMT method can be acquired, and when video information or the likeprovided by the broadcasting service adopting the MPEG2-TS method as themedia transport method is displayed, the event schedule information(EIT) of the broadcasting service adopting the MPEG2-TS method can beacquired.

However, the broadcast receiving apparatus 800 of the present embodimentcan acquire both MH-EIT and EIT when displaying video information or thelike provided by the broadcasting service adopting the MMT method as themedia transport method as well as when displaying video information orthe like provided by the broadcasting service adopting the MPEG2-TSmethod as the media transport method, and thus the user friendliness canbe improved.

FIG. 27A shows one example of the EPG screen in the broadcast receivingapparatus 800 of the present embodiment. In FIG. 27A, an EPG screen 162i is an EPG screen that is created based on the MH-EIT of thebroadcasting service adopting the MMT method as the media transportmethod, and “M1 television”, “M2 broadcasting”, “M3 channel”, “M4 TV”,“television M5” and the like are the names of broadcast stations thatprovide the broadcasting service adopting the MMT method as the mediatransport method. Further, an EPG screen 162 j is an EPG screen that iscreated based on the EIT of the broadcasting service adopting theMPEG2-TS method as the media transport method, and “T6 television”, “T7broadcasting”, “T8 channel”, “T9 TV”, “television TA” and others are thenames of broadcast stations that provide the broadcasting serviceadopting the MPEG2-TS method as the media transport method.

For example, when the user who is watching a broadcasting programprovided by the broadcasting service adopting the MMT method as themedia transport method gives an instruction to display the EPG screen byoperating the remote controller (not shown in the drawings), an initialEPG screen (not shown) appears. The initial EPG screen is an EPG screenthat is created based on the MH-EIT of the broadcasting service adoptingthe MMT method as the media transport method, and shows detailedinformation of broadcasting programs of respective channels in a timezone of “from 17:00 (around current time)” on “Oct. 7, 2014 (today)”.Then, if the user wishes to check detailed information of broadcastingprograms of respective channels in a time zone of “from 20:00” on “Oct.9, 2014” and gives an instruction to update the EPG screen by operatingthe remote controller (not shown in the drawings), the EPG screen 162 iappears.

Subsequently, if the user wishes to check detailed information ofbroadcasting programs provided by the broadcasting service adopting theMPEG2-TS method as the media transport method and gives a networkswitching instruction by operating the remote controller (not shown),the EPG screen 162 j appears. At this time, the broadcast receivingapparatus 800 of the present embodiment controls the screen to displaydetailed information of broadcasting programs of the respective channelsin the same time zone on the same date (i.e., “from 20:00” on “Oct. 9,2014”) as those of the EPG screen 162 i displayed just before thenetwork switching, instead of the initial EPG screen that is createdbased on the EIT of the broadcasting service adopting the MPEG2-TSmethod as the media transport method (i.e., detailed information ofbroadcasting programs of the respective channels in the time zone of“from 17:00” on “Oct. 7, 2014”).

Through the control described above, the user can consecutively checkdetailed information of broadcasting programs provided in the same timezone on the same date by a plurality of networks with different mediatransport methods by a simple operation. Namely, the user friendlinessof the broadcast receiving apparatus 800 can be improved.

FIG. 27B is a diagram showing an example of the EPG screen in thebroadcast receiving apparatus 800 of the present embodiment that isdifferent from the example mentioned above. An EPG screen 162 k shows astate obtained by scrolling the EPG screen 162 i of FIG. 27A in thedirection of arrangement of the channels (horizontal direction) by theoperation of the remote controller (not shown). Namely, in the exampleof FIG. 27B, by scrolling the EPG screen in the direction of arrangementof the channels (horizontal direction), the channel information that iscreated based on the MH-EIT of the broadcasting service adopting the MMTmethod as the media transport method and the channel information that iscreated based on the EIT of the broadcasting service adopting theMPEG2-TS method as the media transport method are displayed on the sametime axis in a seamless manner.

Accordingly, even when the user wishes to check the channel informationthat is created based on the EIT of the broadcasting service adoptingthe MPEG2-TS method as the media transport method while checking thechannel information that is created based on the MH-EIT of thebroadcasting service adopting the MMT method as the media transportmethod, the user does not need to give a network switching instructionor the like by the operation of the remote controller (not shown). Inaddition, the user is allowed to collectively check detailed informationof broadcasting programs provided in the same time zone on the same dateby a plurality of networks with different media transport methods.Namely, the user friendliness of the broadcast receiving apparatus 800can be improved.

Third Embodiment

A third embodiment according to the present invention will be describedbelow. Constituent elements, processes, effects and the like of thepresent embodiment are the similar to those of the first embodiment orthe second embodiment unless otherwise specified. For this reason, inthe following description, differences between the present embodimentand the first embodiment or the second embodiment will be mainlydescribed, and description of the matters common to both embodiments isomitted as much as possible in order to avoid redundant description.

FIG. 28 shows one example of an appearance diagram of a remotecontroller 100R that is used for an input of an operation instructioninto a broadcast receiving apparatus 100 according to the presentembodiment. As well as the embodiments described above, the remotecontroller 100R transmits a control signal or control information to anoperation input unit of the broadcast receiving apparatus 100 via aninfrared ray or wireless communication in response to pressing a key orbutton by a user, whereby a control of the broadcast receiving apparatus100 is realized. The remote controller 100R according to the presentembodiment also includes keys or buttons similar to those of the remotecontroller shown in FIG. 15A (hereinafter, these are simply referred toas “keys”). The remote controller 100R according to the presentembodiment further includes a multimedia key 100R9 used for aninstruction to receive multimedia service. Further, as well as thebroadcast receiving apparatus according to the second embodiment, thebroadcast receiving apparatus 100 according to the present embodiment isa television receiver compliant with both an MMT method and an MPEG2-TSmethod as a media transport method. A network to be received can beswitched by a network switching key 100RA. Namely, in the presentembodiment, by pressing a “BS” key or the like of the network switchingkey 100RA, 2K broadcasting by the MPEG2-TS method may be allowed to bereceived. By pressing a “HIGH” key of the network switching key 100RA,4K/8K broadcasting by the MMT method may be allowed to be received.

In the broadcast receiving apparatus 100 according to the presentembodiment, an operation when the multimedia key 100R9 is pressed isdifferentiated depending upon whether the broadcast receiving apparatus100 receives and displays any of a broadcasting program transmitted bythe MPEG2-TS method (that is, a broadcasting program of the 2Kbroadcasting) or a broadcasting program transmitted by the MMT method(that is, a broadcasting program of the 4K/8K broadcasting), whether thebroadcast receiving apparatus 100 can communicate with each serverapparatus (service provider server 400 or the like) on the Internet 200or not, and the like. These kinds of determination may be executed by amain control unit of the broadcast receiving apparatus 100, which hasbeen explained in the embodiments described above. FIG. 29 shows anoutline of the operation when the multimedia key 100R9 is pressed in thebroadcast receiving apparatus 100 according to the present embodiment.Note that the multimedia service and the multimedia key may respectivelybe referred to as “MM service” and an “MM key” in the followingdescription and the drawings.

Hereinafter, details of the operation when the MM key 100R9 is pressedunder each of conditions shown in FIG. 29 in the broadcast receivingapparatus 100 according to the present embodiment will be described.

[Operation when Broadcasting Program of MPEG2-TS Method is Received andDisplayed]

As shown in FIG. 29, in a case where the broadcast receiving apparatus100 receives and displays a broadcasting program transmitted by theMPEG2-TS method (a broadcasting program of the 2K broadcasting), thebroadcast receiving apparatus 100 according to the present embodimentcan further execute an operation of each of [Operation Example 11] to[Operation Example 18] in accordance with conditions such as whether thebroadcast receiving apparatus 100 can communicate with each serverapparatus on the Internet 200 or not, or whether a broadcasting programunder reception (that is, a broadcasting program that is being receivedcurrently) is compliant with Hybridcast or data broadcasting or not.

Here, the “Hybridcast” is a broadcast cooperative technique defined by ageneral incorporated association “IPTV forum (IPTV FORUM JAPAN)”.Specifically, this is a broadcast communication cooperative technique inwhich data for display, which is link with a broadcasting programtransmitted by the MPEG2-TS method (Hybridcast data), are distributed tobroadcast receiving apparatuses via an IP communication network anddisplay of the broadcasting program transmitted by the MPEG2-TS methodand display using the Hybridcast data are linked with each other anddisplayed on a broadcasting receiver. In the present embodiment, in acase where an MPEG2-TS decode processing unit 842 in the broadcastreceiving apparatus 100 according to the second embodiment is compliantwith the Hybridcast, the MPEG2-TS decode processing unit 842 decodes abroadcasting program that is transmitted by the MPEG2-TS method andreceived by a second tuner/demodulating unit 832; decodes Hybridcastdata acquired from an external server via a LAN communication unit 821;and displays both by linking with decoded data of the both. Explanationof a detailed operation will be omitted herein because it is disclosedin standards issued by the IPTV forum.

Further, the “data broadcasting” is a technique defined by a generalincorporated association “Association of Radio Industries and Businesses(ARIB)” in STD-B24 standard. A broadcast receiving apparatus receivesdata broadcasting media (characters, still image, video, audio and thelike) that is multiplexed on a stream together with a broadcastingprogram transmitted by the MPEG2-TS method and transmitted, and thebroadcast receiving apparatus displays or outputs them. In the presentembodiment, in a case where data of the data broadcasting aremultiplexed to a stream of the broadcasting program received by thesecond tuner/demodulating unit 832 and transmitted by the MPEG2-TSmethod and transmitted in the broadcast receiving apparatus 100according to the second embodiment, the MPEG2-TS decode processing unit842 decodes both video data of the broadcasting program and the data ofthe data broadcasting, whereby it is possible to display both of thedecoded data at the same time. Explanation of a detailed operation willbe omitted herein because it is disclosed in standards issued byAssociation of Radio Industries and Businesses.

Operation Example 11

FIG. 30 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe Hybridcast and compliant with the data broadcasting in a state wherethe broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200. Further, in the broadcastreceiving apparatus 100 according to the present embodiment, anoperation may also be differentiated under the condition furtherdepending upon whether a broadcasting program under reception is aprogram that contains setting for automatically starting a databroadcasting screen or not.

Note that only any one of [Operation Example 11-1] and [OperationExample 11-2] described below may be selected and operated/controlled.Similarly, only any one of [Operation Example 11-3] and [OperationExample 11-4] described below may be selected and operated/controlled.

Operation Example 11-1

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen, the data broadcasting screen is automatically started “beforepressing of the MM key” and displayed, and display of the databroadcasting screen is then continued. When “pressing of the MM key(first time)” is carried out in this state, the data broadcasting screenmay be switched to a non-display state to return to a screen for thebroadcasting program. Further, when “pressing of the MM key (secondtime)” is carried out, the data broadcasting screen may be displayedagain. Hereinafter, whenever the MM key is pressed, the operation isrepeated. By executing such an operation, it becomes possible to easilyswitch whether the data broadcasting screen is to be displayed or not inresponse to an instruction of the user.

Operation Example 11-2

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen, the data broadcasting screen is automatically started “beforepressing of the MM key” and displayed, and display of the databroadcasting screen is then continued. When the “pressing of the MM key(first time)” is carried out in this state, a message that pressing ofthe MM key is invalid (for example, “this key cannot be used currently”or the like) may be displayed while the data broadcasting screen isbeing displayed. In this case, display of the data broadcasting screenis continued until the broadcast receiving apparatus 100 receives acommand to instruct termination of the data broadcasting screen frombroadcast waves or until the user changes channels. Namely, a broadcaststation side can control whether the data broadcasting screen is to bedisplayed or not.

Operation Example 11-3

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen and setting for switching the data broadcasting screen displayedby the automatic start to the non-display state after a given time, thedata broadcasting screen is automatically started “before pressing ofthe MM key” and once displayed, and the data broadcasting screen isshifted to the non-display state after a given time to return to ascreen for the broadcasting program (hereinafter, referred to also as a“broadcasting program screen”). When the “pressing of the MM key (firsttime)” is carried out in this state, the data broadcasting screen may bedisplayed again. Further, when the “pressing of the MM key (secondtime)” is carried out, the data broadcasting screen may become thenon-display state again to return to the screen for the broadcastingprogram. Hereinafter, whenever the MM key is pressed, the operation isrepeated. By executing such an operation, the data broadcasting screenthat once becomes the non-display state can be displayed optionally inresponse to an instruction of the user.

Operation Example 11-4

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen and further contains setting for switching the data broadcastingscreen displayed by the automatic start to the non-display state after agiven time, the data broadcasting screen is automatically started“before pressing of the MM key” and once displayed, and the databroadcasting screen is shifted to the non-display state after a giventime to return to the screen for the broadcasting program. When the“pressing of the MM key (first time)” is carried out in this state, themessage that pressing of the MM key is invalid (for example, “this keycannot be used currently” or the like) may be displayed while thebroadcasting program screen is being displayed. In this case, it becomespossible to prevent the data broadcasting screen whose display wasterminated by a control of a broadcast station from being displayedagain in response to an instruction of the user.

Operation Example 11-5

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the databroadcasting screen, the data broadcasting screen is being in thenon-display state “before pressing of the MM key”, and display of thescreen for the broadcasting program is continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the databroadcasting screen may be displayed. Further, when the “pressing of theMM key (second time)” is carried out, the data broadcasting screen maybecome the non-display state to return to the screen for thebroadcasting program. Hereinafter, whenever the MM key is pressed, theoperation is repeated. By executing such an operation, it becomespossible to easily switch whether the data broadcasting screen is to bedisplayed or not in response to an instruction of the user.

Operation Example 12

FIG. 31 is an operation of the broadcast receiving apparatus 100 at thetime of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe Hybridcast and the data broadcasting in a state where the broadcastreceiving apparatus 100 cannot communicate with each server apparatus onthe Internet 200.

Operation Example 12-1

Since the broadcasting program under reception is a program uncompliantwith Hybridcast service and data broadcasting service, display of thescreen for the broadcasting program is continued “before pressing of theMM key”. When the “pressing of the MM key (first time)” is carried outin this state, the message that pressing of the MM key is invalid (forexample, “this key cannot be used currently” or the like) may bedisplayed while the broadcasting program screen is being displayed. Byexecuting such an operation, it becomes possible to inform the user thatthis is a program uncompliant with service of data broadcasting and thelike.

Operation Example 13

FIG. 32 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe Hybridcast and compliant with the data broadcasting in a state wherethe broadcast receiving apparatus 100 can communicate with each serverapparatus on the Internet 200. Further, in the broadcast receivingapparatus 100 according to the present embodiment, an operation may alsobe differentiated under the condition further depending upon whether thebroadcasting program under reception is a program that contains settingfor automatically starting the data broadcasting screen or not.

Note that only any one of [Operation Example 13-1] and [OperationExample 13-2] described below, and only any one of [Operation Example13-3] and [Operation Example 13-4] described below may be selected andoperated/controlled.

Operation Example 13-1

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen, the data broadcasting screen is automatically started “beforepressing of the MM key” and displayed, and display of the databroadcasting screen is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the data broadcasting screenmay be switched to the non-display state to return to the screen for thebroadcasting program. Further, when the “pressing of the MM key (secondtime)” is carried out, the data broadcasting screen may be displayedagain. Hereinafter, whenever the MM key is pressed, the operation isrepeated. By executing such an operation, it becomes possible to easilyswitch whether the data broadcasting screen is to be displayed or not inresponse to an instruction of the user.

Operation Example 13-2

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen, the data broadcasting screen is automatically started “beforepressing of the MM key” and displayed, and display of the databroadcasting screen is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the message that pressing ofthe MM key is invalid (for example, “this key cannot be used currently”or the like) may be displayed while the data broadcasting screen isbeing displayed. In this case, display of the data broadcasting screenis continued until the broadcast receiving apparatus 100 receives acommand to instruct termination of the data broadcasting screen frombroadcast waves or until the user changes channels. Namely, thebroadcast station side can control whether the data broadcasting screenis to be displayed or not.

Operation Example 13-3

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen and further contains setting for switching the data broadcastingscreen displayed by the automatic start to the non-display state after agiven time, the data broadcasting screen is automatically started“before pressing of the MM key” and once displayed, and the databroadcasting screen is shifted to the non-display state after a giventime to return to a screen for the broadcasting program (hereinafter,referred to also as a “broadcasting program screen”). When the “pressingof the MM key (first time)” is carried out in this state, the databroadcasting screen may be displayed again. Further, when the “pressingof the MM key (second time)” is carried out, the data broadcastingscreen may become the non-display state again to return to the screenfor the broadcasting program. Hereinafter, whenever the MM key ispressed, the operation is repeated. By executing such an operation, thedata broadcasting screen that once becomes the non-display state can bedisplayed optionally in response to an instruction of the user.

Operation Example 13-4

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the data broadcastingscreen and further contains setting for switching the data broadcastingscreen displayed by the automatic start to the non-display state after agiven time, the data broadcasting screen is automatically started“before pressing of the MM key” and once displayed, and the databroadcasting screen is shifted to the non-display state after a giventime to return to the screen for the broadcasting program. When the“pressing of the MM key (first time)” is carried out in this state, themessage that pressing of the MM key is invalid (for example, “this keycannot be used currently” or the like) may be displayed while thebroadcasting program screen is being displayed. In this case, it becomespossible to prevent the data broadcasting screen whose display wasterminated by a control of a broadcast station from being displayedagain in response to an instruction of the user.

Operation Example 13-5

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the databroadcasting screen, the data broadcasting screen is being in thenon-display state “before pressing of the MM key”, and display of thescreen for the broadcasting program is continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the databroadcasting screen may be displayed. Further, when the “pressing of theMM key (second time)” is carried out, the data broadcasting screen maybecome the non-display state to return to the screen for thebroadcasting program. Hereinafter, whenever the MM key is pressed, theoperation is repeated. By executing such an operation, it becomespossible to easily switch whether the data broadcasting screen is to bedisplayed or not in response to an instruction of the user.

Operation Example 14

FIG. 33 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe Hybridcast and the data broadcasting in a state where the broadcastreceiving apparatus 100 can communicate with each server apparatus onthe Internet 200.

Operation Example 14-1

Since the broadcasting program under reception is a program uncompliantwith the Hybridcast service and the data broadcasting service, displayof the screen for the broadcasting program is continued “before pressingof the MM key”. When the “pressing of the MM key (first time)” iscarried out in this state, the message that pressing of the MM key isinvalid (for example, “this key cannot be used currently” or the like)may be displayed while the broadcasting program screen is beingdisplayed. By executing such an operation, it becomes possible to informthe user that this is a program uncompliant with service of databroadcasting and the like.

Operation Example 15

FIG. 34 and FIG. 35 show an operation of the broadcast receivingapparatus 100 at the time of pressing of the MM key 100R9 in a casewhere the broadcast receiving apparatus 100 receives a broadcastingprogram compliant with the Hybridcast and the data broadcasting in astate where the broadcast receiving apparatus 100 cannot communicatewith each server apparatus on the Internet 20. FIG. 34 is an example ofa case where the data broadcasting service is prioritized with respectto the Hybridcast service. FIG. 35 is an example of a case where thedata broadcasting service is not prioritized with respect to theHybridcast service. Further, in the broadcast receiving apparatus 100according to the present embodiment, an operation may also bedifferentiated under the condition further depending upon whether theprogram is a program that contains setting for automatically starting aHybridcast service screen or not, whether the broadcasting program underreception is a program that contains setting for automatically startingthe data broadcasting screen or not, or the like.

Note that only any one of [Operation Example 15-1] and [OperationExample 15-2] described below, only any one of [Operation Example 15-3]and [Operation Example 15-4] described below, only any one of [OperationExample 15-6] and [Operation Example 15-7] described below, only any oneof [Operation Example 15-8] and [Operation Example 15-9] describedbelow, and only any one of [Operation Example 15-10] and [OperationExample 15-11] described below may be selected and operated/controlled.

Operation Example 15-1

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service and contains setting for automatically starting thedata broadcasting screen, the data broadcasting screen is automaticallystarted “before pressing of the MM key” and displayed, and display ofthe data broadcasting screen is then continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the databroadcasting screen may be switched to the non-display state to returnto the screen for the broadcasting program. Further, when the “pressingof the MM key (second time)” is carried out, the data broadcastingscreen may be displayed again. Hereinafter, whenever the MM key ispressed, the operation is repeated. By executing such an operation, itbecomes possible to easily switch whether the data broadcasting screenis to be displayed or not in response to an instruction of the user.

Operation Example 15-2

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service and contains setting for automatically starting thedata broadcasting screen, the data broadcasting screen is automaticallystarted “before pressing of the MM key” and displayed, and display ofthe data broadcasting screen is then continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the message thatpressing of the MM key is invalid (for example, “this key cannot be usedcurrently” or the like) may be displayed while the data broadcastingscreen is being displayed. In this case, display of the databroadcasting screen is continued until the broadcast receiving apparatus100 receives a command to instruct termination of the data broadcastingscreen from broadcast waves or until the user changes channels. Namely,the broadcast station side can control whether the data broadcastingscreen is to be displayed or not.

Operation Example 15-3

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service, contains setting for automatically starting the databroadcasting screen, and further contains setting for switching the databroadcasting screen displayed by the automatic start to the non-displaystate after a given time, then the data broadcasting screen isautomatically started “before pressing of the MM key” and oncedisplayed. The data broadcasting screen is then switched to thenon-display state after a given time to return to the screen for thebroadcasting program. When the “pressing of the MM key (first time)” iscarried out in this state, the data broadcasting screen may be displayedagain. Further, when the “pressing of the MM key (second time)” iscarried out, the data broadcasting screen may become the non-displaystate again to return to the screen for the broadcasting program.Hereinafter, whenever the MM key is pressed, the operation is repeated.By executing such an operation, it becomes possible to optionallydisplay the data broadcasting screen that became the non-display stateonce in response to an instruction of the user.

Operation Example 15-4

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service, contains setting for automatically starting the databroadcasting screen, and further contains setting for switching the databroadcasting screen displayed by the automatic start to the non-displaystate after a given time, then the data broadcasting screen isautomatically started “before pressing of the MM key” and oncedisplayed. The data broadcasting screen is then switched to thenon-display state after a given time to return to the screen for thebroadcasting program. When the “pressing of the MM key (first time)” iscarried out in this state, the message that pressing of the MM key isinvalid (for example, “this key cannot be used currently” or the like)may be displayed while the broadcasting program screen is beingdisplayed. In this case, it becomes possible to prevent the databroadcasting screen whose display was terminated by a control of thebroadcast station from being displayed again in response to aninstruction of the user.

Operation Example 15-5

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service and contains setting for preventing automatic startof the data broadcasting screen, the data broadcasting screen is beingin the non-display state “before pressing of the MM key”, and display ofthe screen for the broadcasting program is continued. When the “pressingof the MM key (first time)” is carried out in this state, the databroadcasting screen may be displayed. Further, when the “pressing of theMM key (second time)” is carried out, the data broadcasting screen maybecome the non-display state to return to the screen for thebroadcasting program. Hereinafter, whenever the MM key is pressed, theoperation is repeated. By executing such an operation, it becomespossible to easily switch whether the data broadcasting screen is to bedisplayed or not in response to an instruction of the user.

Operation Example 15-6

In a case where the broadcast receiving apparatus 100 is in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200 even though the broadcastingprogram under reception is a program that prioritizes the Hybridcastservice compared with the data broadcasting service, the Hybridcastservice cannot be started. In a case where the broadcasting programunder reception is a program that contains setting for automaticallystarting the data broadcasting screen in this state, the databroadcasting screen is automatically started “before pressing of the MMkey” and displayed, and display of the data broadcasting screen is thencontinued. When the “pressing of the MM key (first time)” is carried outin this state, the data broadcasting screen may be switched to thenon-display state to return to the screen for the broadcasting program.Further, when the “pressing of the MM key (second time)” is carried out,the data broadcasting screen may be displayed again. Hereinafter,whenever the MM key is pressed, the operation is repeated. By executingsuch an operation, it becomes possible to easily switch whether the databroadcasting screen is to be displayed or not in response to aninstruction of the user.

Operation Example 15-7

In a case where the broadcast receiving apparatus 100 is in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200 even though the broadcastingprogram under reception is a program that prioritizes the Hybridcastservice compared with the data broadcasting service, the Hybridcastservice cannot be started. In a case where the broadcasting programunder reception is a program that contains setting for automaticallystarting the data broadcasting screen in this state, the databroadcasting screen is automatically started “before pressing of the MMkey” and displayed, and display of the data broadcasting screen is thencontinued. When the “pressing of the MM key (first time)” is carried outin this state, the message that pressing of the MM key is invalid (forexample, “this key cannot be used currently” or the like) may bedisplayed while the data broadcasting screen is being displayed. In thiscase, display of the data broadcasting screen is continued until thebroadcast receiving apparatus 100 receives a command to instructtermination of the data broadcasting screen from broadcast waves oruntil the user changes channels. Namely, the broadcast station side cancontrol whether the data broadcasting screen is to be displayed or not.

Operation Example 15-8

In a case where the broadcast receiving apparatus 100 is in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200 even though the broadcastingprogram under reception is a program that prioritizes the Hybridcastservice compared with the data broadcasting service, the Hybridcastservice cannot be started. In a case where the broadcasting programunder reception is a program that contains setting for automaticallystarting the data broadcasting screen and further contains setting forswitching the data broadcasting screen displayed by the automatic startto the non-display state after a given time in this state, the databroadcasting screen is automatically started “before pressing of the MMkey” and once displayed. The data broadcasting screen is then switchedto the non-display state after a given time to return to the screen forthe broadcasting program. When the “pressing of the MM key (first time)”is carried out in this state, the data broadcasting screen may bedisplayed again. Further, when the “pressing of the MM key (secondtime)” is carried out, the data broadcasting screen may become thenon-display state again to return to the screen for the broadcastingprogram. Hereinafter, whenever the MM key is pressed, the operation isrepeated. By executing such an operation, it becomes possible tooptionally display the data broadcasting screen that became thenon-display state once in response to an instruction of the user.

Operation Example 15-9

In a case where the broadcast receiving apparatus 100 is in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200 even though the broadcastingprogram under reception is a program that prioritizes the Hybridcastservice compared with the data broadcasting service, the Hybridcastservice cannot be started. In a case where the broadcasting programunder reception is a program that contains setting for automaticallystarting the data broadcasting screen and further contains setting forswitching the data broadcasting screen displayed by the automatic startto the non-display state after a given time in this state, the databroadcasting screen is automatically started “before pressing of the MMkey” and once displayed, and the data broadcasting screen is shifted tothe non-display state after a given time to return to the screen for thebroadcasting program. When the “pressing of the MM key (first time)” iscarried out in this state, the message that pressing of the MM key isinvalid (for example, “this key cannot be used currently” or the like)may be displayed while the broadcasting program screen is beingdisplayed. In this case, it becomes possible to prevent the databroadcasting screen whose display was terminated by a control of thebroadcast station from being displayed again in response to aninstruction of the user.

Operation Example 15-10

In a case where the broadcast receiving apparatus 100 is in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200 even though the broadcastingprogram under reception is a program that prioritizes the Hybridcastservice compared with the data broadcasting service, the Hybridcastservice cannot be started. In a case where the broadcasting programunder reception is a program that contains setting for preventingautomatic start of the data broadcasting screen in this state, the databroadcasting screen may be being in the non-display state “beforepressing of the MM key”, and display of the screen for the broadcastingprogram may be continued. When the “pressing of the MM key (first time)”is carried out in this state, the data broadcasting screen may bedisplayed. Further, when the “pressing of the MM key (second time)” iscarried out, the data broadcasting screen may become the non-displaystate to return to the screen for the broadcasting program. Hereinafter,whenever the MM key is pressed, the operation is repeated. By executingsuch an operation, it becomes possible to easily switch whether the databroadcasting screen is to be displayed or not in response to aninstruction of the user.

Note that in a case where the broadcasting program under reception is aprogram that contains setting for automatically starting the databroadcasting screen, the operation or control in the Operation Example15-10 may be executed without automatically starting the databroadcasting screen “before pressing of the MM key”.

Operation Example 15-11

In a case where the broadcast receiving apparatus 100 is in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200 even though the broadcastingprogram under reception is a program that prioritizes the Hybridcastservice compared with the data broadcasting service, the Hybridcastservice cannot be started. In a case where the broadcasting programunder reception is a program that contains setting for preventingautomatic start of the data broadcasting screen in this state, the databroadcasting screen may be being in the non-display state “beforepressing of the MM key”, and display of the screen for the broadcastingprogram may be continued. When the “pressing of the MM key (first time)”is carried out in this state, the message that pressing of the MM key isinvalid (for example, “this key cannot be used currently” or the like)may be displayed while the broadcasting program screen is beingdisplayed. By executing such an operation, it becomes possible to informthe user that it is in a state where the broadcast receiving apparatus100 cannot cope with the Hybridcast service or the like.

Note that in a case where the broadcasting program under reception is aprogram that contains setting for automatically starting the databroadcasting screen, the operation or control in the Operation Example15-11 may be executed without automatically starting the databroadcasting screen “before pressing of the MM key”.

Operation Example 16

FIG. 36 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program compliant withthe Hybridcast and uncompliant with the data broadcasting in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200.

Operation Example 16-1

In a case where the broadcast receiving apparatus 100 is in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200 even though the broadcastingprogram under reception is a program compliant with the Hybridcastservice, the Hybridcast service cannot be started. In this state,display of the screen for the broadcasting program may be continued“before pressing of the MM key”. When the “pressing of the MM key (firsttime)” is carried out in this state, the message that pressing of the MMkey is invalid (for example, “this key cannot be used currently” or thelike) may be displayed while the broadcasting program screen is beingdisplayed. By executing such an operation, it becomes possible to informthe user that it is in a state where the broadcast receiving apparatus100 cannot cope with the Hybridcast service or the like.

Operation Example 17

FIG. 37 and FIG. 38 show an operation of the broadcast receivingapparatus 100 at the time of pressing of the MM key 100R9 in a casewhere the broadcast receiving apparatus 100 receives a broadcastingprogram compliant with the Hybridcast and the data broadcasting in astate where the broadcast receiving apparatus 100 can communicate witheach server apparatus on the Internet 200. FIG. 37 is an example of acase where the data broadcasting service is prioritized with respect tothe Hybridcast service. FIG. 38 is an example of a case where the databroadcasting service is not prioritized with respect to the Hybridcastservice. Further, in the broadcast receiving apparatus 100 according tothe present embodiment, an operation may also be differentiated underthe condition further depending upon whether the program is a programthat contains setting for automatically starting a Hybridcast servicescreen or not, whether the broadcasting program under reception is aprogram that contains setting for automatically starting the databroadcasting screen or not, or the like.

Note that only any example of [Operation Example 17-1], [OperationExample 17-2], and [Operation Example 17-3] described below, only anyexample of [Operation Example 17-4] and [Operation Example 17-5]described below, only any example of [Operation Example 17-7],[Operation Example 17-8], and [Operation Example 17-9] described below,and only any example of [Operation Example 17-10] and [Operation Example17-11] described below may be selected and operated/controlled.

Operation Example 17-1

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service and contains setting for automatically starting thedata broadcasting screen, the data broadcasting screen is automaticallystarted “before pressing of the MM key” and displayed, and display ofthe data broadcasting screen is then continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the databroadcasting screen may be switched to the non-display state to returnto the screen for the broadcasting program. Further, when the “pressingof the MM key (second time)” is carried out, the data broadcastingscreen may be displayed again. Hereinafter, whenever the MM key ispressed, the operation is repeated. By executing such an operation, itbecomes possible to easily switch whether the data broadcasting screenis to be displayed or not in response to an instruction of the user.

Operation Example 17-2

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service and contains setting for automatically starting thedata broadcasting screen, the data broadcasting screen is automaticallystarted “before pressing of the MM key” and displayed, and display ofthe data broadcasting screen is then continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the message thatpressing of the MM key is invalid (for example, “this key cannot be usedcurrently” or the like) may be displayed while the data broadcastingscreen is being displayed. In this case, display of the databroadcasting screen is continued until the broadcast receiving apparatus100 receives a command to instruct termination of the data broadcastingscreen from broadcast waves or until the user changes channels. Namely,the broadcast station side can control whether the data broadcastingscreen is to be displayed or not.

Operation Example 17-3

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service and contains setting for automatically starting thedata broadcasting screen, the data broadcasting screen is automaticallystarted “before pressing of the MM key” and displayed, and display ofthe data broadcasting screen is then continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the databroadcasting screen may be switched to the non-display state, and aHybridcast screen may be displayed. Further, when the “pressing of theMM key (second time)” is carried out, the Hybridcast screen may beswitched to the non-display state, and the broadcasting program screenmay be displayed. By executing such an operation, it becomes possible toeasily switch between the data broadcasting screen and the Hybridcastscreen in response to an instruction of the user.

Operation Example 17-4

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service, contains setting for automatically starting the databroadcasting screen, and further contains setting for switching the databroadcasting screen displayed by the automatic start to the non-displaystate after a given time, then the data broadcasting screen isautomatically started “before pressing of the MM key” and oncedisplayed. The data broadcasting screen is then switched to thenon-display state after a given time to return to the screen for thebroadcasting program. When the “pressing of the MM key (first time)” iscarried out in this state, the data broadcasting screen may be displayedagain. Further, when the “pressing of the MM key (second time)” iscarried out, the data broadcasting screen may become the non-displaystate again to return to the screen for the broadcasting program.Hereinafter, whenever the MM key is pressed, the operation is repeated.By executing such an operation, it becomes possible to optionallydisplay the data broadcasting screen that became the non-display stateonce in response to an instruction of the user.

Operation Example 17-5

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service, contains setting for automatically starting the databroadcasting screen, and further contains setting for switching the databroadcasting screen displayed by the automatic start to the non-displaystate after a given time, then the data broadcasting screen isautomatically started “before pressing of the MM key” and oncedisplayed. The data broadcasting screen is then switched to thenon-display state after a given time to return to the screen for thebroadcasting program. When the “pressing of the MM key (first time)” iscarried out in this state, the message that pressing of the MM key isinvalid (for example, “this key cannot be used currently” or the like)may be displayed while the broadcasting program screen is beingdisplayed. In this case, it becomes possible to prevent the databroadcasting screen whose display was terminated by a control of thebroadcast station from being displayed again in response to aninstruction of the user.

Operation Example 17-6

In a case where the broadcasting program under reception is a programthat prioritizes the data broadcasting service compared with theHybridcast service and contains setting for preventing automatic startof the data broadcasting screen, the data broadcasting screen is beingin the non-display state “before pressing of the MM key”, and display ofthe screen for the broadcasting program is continued. When the “pressingof the MM key (first time)” is carried out in this state, the databroadcasting screen may be displayed. Further, when the “pressing of theMM key (second time)” is carried out, the data broadcasting screen maybecome the non-display state to return to the screen for thebroadcasting program. Hereinafter, whenever the MM key is pressed, theoperation is repeated. By executing such an operation, it becomespossible to easily switch whether the data broadcasting screen is to bedisplayed or not in response to an instruction of the user.

Operation Example 17-7

In a case where the broadcasting program under reception is a programthat prioritizes the Hybridcast service compared with the databroadcasting service and contains setting for automatically starting theHybridcast screen, the Hybridcast screen is automatically started“before pressing of the MM key” and displayed, and display of theHybridcast screen is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the Hybridcast screen may beswitched to the non-display state to return to the screen for thebroadcasting program. Further, when the “pressing of the MM key (secondtime)” is carried out, the Hybridcast screen may be displayed again.Hereinafter, whenever the MM key is pressed, the operation is repeated.By executing such an operation, it becomes possible to easily switchwhether the Hybridcast screen is to be displayed or not in response toan instruction of the user.

Operation Example 17-8

In a case where the broadcasting program under reception is a programthat prioritizes the Hybridcast service compared with the databroadcasting service and contains setting for automatically starting theHybridcast screen, the Hybridcast screen is automatically started“before pressing of the MM key” and displayed, and display of theHybridcast screen is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the message that pressing ofthe MM key is invalid (for example, “this key cannot be used currently”or the like) may be displayed while the Hybridcast screen is beingdisplayed. In this case, display of the Hybridcast screen is continueduntil the broadcast receiving apparatus 100 receives a command toinstruct termination of the Hybridcast screen from broadcast waves oruntil the user changes channels. Namely, the broadcast station side cancontrol whether the Hybridcast screen is to be displayed or not.

Operation Example 17-9

In a case where the broadcasting program under reception is a programthat prioritizes the Hybridcast service compared with the databroadcasting service and contains setting for automatically starting theHybridcast screen, the Hybridcast screen is automatically started“before pressing of the MM key” and displayed, and display of theHybridcast screen is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the Hybridcast screen may beswitched to the non-display state, and the data broadcasting screen maybe displayed. Further, when the “pressing of the MM key (second time)”is carried out, the data broadcasting screen may be switched to thenon-display state, and the broadcasting program screen may be displayed.By executing such an operation, it becomes possible to easily switchbetween the Hybridcast screen and the data broadcasting screen inresponse to an instruction of the user.

Operation Example 17-10

In a case where the broadcasting program under reception is a programthat prioritizes the Hybridcast service compared with the databroadcasting service, contains setting for automatically starting theHybridcast screen, and further contains setting for switching theHybridcast screen displayed by the automatic start to the non-displaystate after a given time, then the Hybridcast screen is automaticallystarted “before pressing of the MM key” and once displayed. TheHybridcast screen is then switched to the non-display state after agiven time to return to the screen for the broadcasting program. Whenthe “pressing of the MM key (first time)” is carried out in this state,the Hybridcast screen may be displayed again. Further, when the“pressing of the MM key (second time)” is carried out, the Hybridcastscreen may become the non-display state again to return to the screenfor the broadcasting program. Hereinafter, whenever the MM key ispressed, the operation is repeated. By executing such an operation, itbecomes possible to optionally display the Hybridcast screen onceswitched to the non-display state in response to an instruction of theuser.

Operation Example 17-11

In a case where the broadcasting program under reception is a programthat prioritizes the Hybridcast service compared with the databroadcasting service, contains setting for automatically starting theHybridcast screen, and further contains setting for switching theHybridcast screen displayed by the automatic start to the non-displaystate after a given time, then the Hybridcast screen is automaticallystarted “before pressing of the MM key” and once displayed. TheHybridcast screen is then switched to the non-display state after agiven time to return to the screen for the broadcasting program. Whenthe “pressing of the MM key (first time)” is carried out in this state,the message that pressing of the MM key is invalid (for example, “thiskey cannot be used currently” or the like) may be displayed while thebroadcasting program screen is being displayed. In this case, it becomespossible to prevent the Hybridcast screen whose display was terminatedby a control of the broadcast station from being displayed again inresponse to an instruction of the user.

Operation Example 17-12

In a case where the broadcasting program under reception is a programthat prioritizes the Hybridcast service compared with the databroadcasting service and contains setting for preventing automatic startof the Hybridcast service, the Hybridcast screen is being in thenon-display state “before pressing of the MM key”, and display of thescreen for the broadcasting program is continued. When the “pressing ofthe MM key (first time)” is carried out in this state, the Hybridcastscreen may be displayed. Further, when the “pressing of the MM key(second time)” is carried out, the Hybridcast screen may become thenon-display state to return to the screen for the broadcasting program.Hereinafter, whenever the MM key is pressed, the operation is repeated.By executing such an operation, it becomes possible to easily switchwhether the Hybridcast screen is to be displayed or not in response toan instruction of the user.

Operation Example 18

FIG. 39 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program compliant withthe Hybridcast and uncompliant with the data broadcasting in a statewhere the broadcast receiving apparatus 100 can communicate with eachserver apparatus on the Internet 200. Further, in the broadcastreceiving apparatus 100 according to the present embodiment, anoperation may also be differentiated under the condition furtherdepending upon whether the broadcasting program under reception is aprogram that contains setting for automatically starting the Hybridcastservice screen or not.

Note that only any one of [Operation Example 18-1] and [OperationExample 18-2] described below, and only any one of [Operation Example18-3] and [Operation Example 18-4] described below may be selected andoperated/controlled.

Operation Example 18-1

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the Hybridcast screen,the Hybridcast screen is automatically started “before pressing of theMM key” and displayed, and display of the Hybridcast screen is thencontinued. When the “pressing of the MM key (first time)” is carried outin this state, the Hybridcast screen may be switched to the non-displaystate to return to the screen for the broadcasting program. Further,when the “pressing of the MM key (second time)” is carried out, theHybridcast screen may be displayed again. Hereinafter, whenever the MMkey is pressed, the operation is repeated. By executing such anoperation, it becomes possible to easily switch whether the Hybridcastscreen is to be displayed or not in response to an instruction of theuser.

Operation Example 18-2

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the Hybridcast screen,the Hybridcast screen is automatically started “before pressing of theMM key” and displayed, and display of the Hybridcast screen is thencontinued. When the “pressing of the MM key (first time)” is carried outin this state, the message that pressing of the MM key is invalid (forexample, “this key cannot be used currently” or the like) may bedisplayed while the Hybridcast screen is being displayed. In this case,display of the Hybridcast screen is continued until the broadcastreceiving apparatus 100 receives a command to instruct termination ofthe Hybridcast screen from broadcast waves or until the user changeschannels. Namely, the broadcast station side can control whether theHybridcast screen is to be displayed or not.

Operation Example 18-3

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the Hybridcast screenand further contains setting for switching the Hybridcast screendisplayed by the automatic start to the non-display state after a giventime, the Hybridcast screen is automatically started “before pressing ofthe MM key” and once displayed, and the Hybridcast screen is shifted tothe non-display state after a given time to return to a screen for thebroadcasting program (hereinafter, referred to also as a “broadcastingprogram screen”). When the “pressing of the MM key (first time)” iscarried out in this state, the Hybridcast screen may be displayed again.Further, when the “pressing of the MM key (second time)” is carried out,the Hybridcast screen may become the non-display state again to returnto the screen for the broadcasting program. Hereinafter, whenever the MMkey is pressed, the operation is repeated. By executing such anoperation, the Hybridcast screen that once becomes the non-display statecan be displayed optionally in response to an instruction of the user.

Operation Example 18-4

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the Hybridcast screenand further contains setting for switching the Hybridcast screendisplayed by the automatic start to the non-display state after a giventime, the Hybridcast screen is automatically started “before pressing ofthe MM key” and once displayed, and the Hybridcast screen is shifted tothe non-display state after a given time to return to the screen for thebroadcasting program. When the “pressing of the MM key (first time)” iscarried out in this state, the message that pressing of the MM key isinvalid (for example, “this key cannot be used currently” or the like)may be displayed while the broadcasting program screen is beingdisplayed. In this case, it becomes possible to prevent the Hybridcastscreen whose display was terminated by a control of a broadcast stationfrom being displayed again in response to an instruction of the user.

Operation Example 18-5

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the Hybridcastscreen, the Hybridcast screen is being in the non-display state “beforepressing of the MM key”, and display of the screen for the broadcastingprogram is continued. When the “pressing of the MM key (first time)” iscarried out in this state, the Hybridcast screen may be displayed.Further, when the “pressing of the MM key (second time)” is carried out,the Hybridcast screen may become the non-display state to return to thescreen for the broadcasting program. Hereinafter, whenever the MM key ispressed, the operation is repeated. By executing such an operation, itbecomes possible to easily switch whether the Hybridcast screen is to bedisplayed or not in response to an instruction of the user.

[Operation when Broadcasting Program of MMT Method is Received andDisplayed]

As shown in FIG. 29, in a case where the broadcast receiving apparatus100 receives and displays a broadcasting program transmitted by the MMTmethod (a broadcasting program of the 4K/8K broadcasting), the broadcastreceiving apparatus 100 according to the present embodiment can furtherexecute an operation of each of [Operation Example 21] to [OperationExample 28] in accordance with conditions such as whether the broadcastreceiving apparatus 100 can communicate with each server apparatus onthe Internet 200 or not, or whether a broadcasting program underreception is compliant with MM service or an LCT control described aboveor not. Note that in the following explanation of the LCT control,display of “region 0” with a full screen just means display with adefault layout. A control to switch between a layout in which the“region 0” is displayed with a full screen and another layout is just acontrol to switch between the default layout and another layout.

Operation Example 21

FIG. 40 to FIG. 43 show an operation of the broadcast receivingapparatus 100 at the time of pressing of the MM key 100R9 in a casewhere the broadcast receiving apparatus 100 receives a broadcastingprogram compliant with the MM service and the LCT control in a statewhere the broadcast receiving apparatus 100 cannot communicate with eachserver apparatus on the Internet 200. Further, in the broadcastreceiving apparatus 100 according to the present embodiment, anoperation may also be differentiated under the condition furtherdepending upon whether a broadcasting program under reception is aprogram that contains setting for automatically starting the MM serviceor not, or whether data of the MM service are acquired from broadcastwaves or acquired from a network. FIG. 40 is an example of a case wheredata of the MM service are acquired from the broadcast waves by aprogram that contains setting for automatically starting the MM service.FIG. 41 is an example of a case where data of the MM service areacquired from the network by the program that contains setting forautomatically starting the MM service. FIG. 42 is an example of a casewhere data of the MM service are acquired from the broadcast waves by aprogram that contains setting for preventing automatic start of the MMservice. FIG. 43 is an example of a case where data of the MM serviceare acquired from the network by the program that contains setting forpreventing automatic start of the MM service.

Note that only any one of [Operation Example 21-1] to [Operation Example21-5] described below, only any one of [Operation Example 21-6] to[Operation Example 21-10] described below, only any one of [OperationExample 21-11] to [Operation Example 21-13] described below, and onlyany one of [Operation Example 21-17] to [Operation Example 21-21]described below may be selected and operated/controlled.

Operation Example 21-1

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from broadcast waves, theMM service is automatically started “before pressing of the MM key” anddisplayed in the “region 0” of a state where the LCT control is appliedto a screen for the broadcasting program (a state where the “region 0”and the other regions exist; hereinafter, expression “state where theLCT control is applied” has the similar meaning), and display of ascreen for the MM service is then continued. When the “pressing of theMM key (first time)” is carried out in this state, the MM service in the“region 0” may be terminated to return to display of the screen for thebroadcasting program while maintaining the LCT control. Further, whenthe “pressing of the MM key (second time)” is carried out, the MMservice may be started again in the “region 0” and displayed whilemaintaining the LCT control. By executing such an operation, it becomespossible to easily switch whether the MM service is to be started orterminated in response to an instruction of the user.

Operation Examples 21-2 to 4

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from broadcast waves, theMM service is automatically started “before pressing of the MM key” anddisplayed in the “region 0” in a state where the LCT control is appliedto the screen for the broadcasting program, and display of the screenfor the MM service is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the LCT control may beterminated while continuing display of the screen for the MM service.Namely, display of the screen for the MM service may be shifted fromdisplay of only the “region 0” under the LCT control to display thereofwith a full screen. Further, when the “pressing of the MM key (secondtime)” is carried out, the LCT control may be executed again whilecontinuing display of the screen for the MM service. In this case, theMM service may be shifted from display thereof with a full screen todisplay thereof in the “region 0”. (Operation Example 21-2)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, andthe LCT control may further be executed again. (Operation Example 21-3)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, anddisplay thereof with a full screen may be continued. (Operation Example21-4) By executing such an operation, it becomes possible to furthereasily switch whether the MM service is to be started or terminated inresponse to an instruction of the user while switching between validnessand invalidness of the LCT control.

Operation Example 21-5

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from broadcast waves, theMM service is automatically started “before pressing of the MM key” anddisplayed in the “region 0” in a state where the LCT control is appliedto the screen for the broadcasting program, and display of the screenfor the MM service is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the message that pressing ofthe MM key is invalid (for example, “this key cannot be used currently”or the like) may be displayed. In this case, display of the screen forthe MM service in the “region 0” is continued until the broadcastreceiving apparatus 100 receives a command to instruct termination ofthe MM service from broadcast waves or until the user changes channels.Namely, the broadcast station side can control whether the MM service isto be started or terminated.

Operation Examples 21-6 to 7

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, settingfor acquiring data of the MM service from broadcast waves, and settingfor terminating display of the screen for the MM service that isautomatically started after a given time, then the MM service isautomatically started “before pressing of the MM key” and once displayedin the “region 0” in a state where the LCT control is applied to thescreen for the broadcasting program, and the screen for the MM serviceis switched to the non-display state after a given time to return to thescreen for the broadcasting program. When the “pressing of the MM key(first time)” is carried out in this state, the MM service may bestarted again in the “region 0” and displayed while maintaining the LCTcontrol. Further, when the “pressing of the MM key (second time)” iscarried out, the MM service in the “region 0” may be terminated again toreturn to display of the screen for the broadcasting program whilemaintaining the LCT control. (Operation Example 21-6) Alternatively, theLCT control may be terminated while continuing display of the screen forthe MM service. Namely, display of the screen for the MM service may beshifted from display of only the “region 0” under the LCT control todisplay thereof with a full screen. (Operation Example 21-7) Byexecuting such an operation, it becomes possible to further easilyswitch whether the MM service is to be started or terminated in responseto an instruction of the user while switching between validness andinvalidness of the LCT control.

Operation Examples 21-8 to 10

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, settingfor acquiring data of the MM service from broadcast waves, and settingfor terminating display of the screen for the MM service that isautomatically started after a given time, then the MM service isautomatically started “before pressing of the MM key” and once displayedin the “region 0” in a state where the LCT control is applied to thescreen for the broadcasting program, and the screen for the MM serviceis switched to the non-display state after a given time to return to thescreen for the broadcasting program. When the “pressing of the MM key(first time)” is carried out in this state, the MM service may bestarted again after the LCT control is terminated and it is shifted todisplay thereof with a full screen. Further, when the “pressing of theMM key (second time)” is carried out, the LCT control may be executedagain while continuing display of the screen for the MM service. In thiscase, the MM service may be shifted from display thereof with a fullscreen to display thereof in the “region 0”. (Operation Example 21-8)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, andthe LCT control may further be executed again. (Operation Example 21-9)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, anddisplay thereof with a full screen may be continued. (Operation Example21-10) By executing such an operation, it becomes possible to furthereasily switch whether the MM service is to be started or terminated inresponse to an instruction of the user while switching between validnessand invalidness of the LCT control.

Operation Example 21-11

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from broadcast waves, theLCT control applied to the screen for the broadcasting program isterminated “before pressing of the MM key” and it is shifted to displaythereof with a full screen, and the MM service is further started anddisplayed. When the “pressing of the MM key (first time)” is carried outin this state, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, anddisplay thereof with a full screen may be continued. Further, when the“pressing of the MM key (second time)” is carried out, the MM servicemay be started again while continuing display thereof with a fullscreen. By executing such an operation, it becomes possible to easilyswitch whether the MM service is to be started or terminated in responseto an instruction of the user.

Operation Examples 21-12 to 13

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from broadcast waves, theLCT control applied to the screen for the broadcasting program isterminated “before pressing of the MM key” and it is shifted to displaythereof with a full screen, and the MM service is further started anddisplayed. When the “pressing of the MM key (first time)” is carried outin this state, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, andthe LCT control may further be executed again. Further, when the“pressing of the MM key (second time)” is carried out, the MM servicemay be started again in the “region 0” and displayed while maintainingthe LCT control. (Operation Example 21-12) Alternatively, the LCTcontrol applied to the screen for the broadcasting program may beterminated and it may be shifted to display with a full screen, and theMM service may further be started again and displayed. (OperationExample 21-13) By executing such an operation, it becomes possible toeasily switch whether the MM service is to be started or terminated inresponse to an instruction of the user.

Operation Example 21-14

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, settingfor acquiring data of the MM service from broadcast waves, and settingfor terminating display of the screen for the MM service that isautomatically started after a given time, then the LCT control appliedto the screen for the broadcasting program is terminated “beforepressing of the MM key” and it is shifted to display thereof with a fullscreen; the MM service is further started and once displayed; and thescreen for the MM service is switched to the non-display state after agiven time to return to the screen for the broadcasting program. At thistime, the LCT control is being terminated. When the “pressing of the MMkey (first time)” is carried out in this state, the MM service may bestarted again while continuing display thereof with a full screen.Further, when the “pressing of the MM key (second time)” is carried out,the MM service may be terminated again while continuing display thereofwith a full screen. By executing such an operation, it becomes possibleto easily switch whether the MM service is to be started or terminatedin response to an instruction of the user.

Operation Example 21-15

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, settingfor acquiring data of the MM service from broadcast waves, and settingfor terminating display of the screen for the MM service that isautomatically started after a given time, then the LCT control appliedto the screen for the broadcasting program is terminated “beforepressing of the MM key” and it is shifted to display thereof with a fullscreen; the MM service is further started and once displayed; and thescreen for the MM service is switched to the non-display state after agiven time to return to the screen for the broadcasting program. At thistime, the LCT control is executed again. When the “pressing of the MMkey (first time)” is carried out in this state, the MM service may bestarted again after the LCT control is terminated and it is shifted todisplay thereof with a full screen. Further, when the “pressing of theMM key (second time)” is carried out, display of the screen for the MMservice may be terminated to return to display of the broadcastingprogram screen, and the LCT control may further be executed again. Byexecuting such an operation, it becomes possible to further easilyswitch whether the MM service is to be started or terminated in responseto an instruction of the user while switching between validness andinvalidness of the LCT control.

Operation Example 21-16

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from a network, the LCTcontrol is applied to the screen for the broadcasting program “beforepressing of the MM key”. However, since the data of the MM servicecannot be acquired from the network, display of the screen for thebroadcasting program is also continued in the “region 0”. When the“pressing of the MM key (first time)” is carried out in this state, themessage that pressing of the MM key is invalid (for example, “this keycannot be used currently” or the like) may be displayed while thebroadcasting program screen is being displayed. In this case, it becomespossible to inform the user that the MM service cannot be started.

Operation Examples 21-17 to 18

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM serviceand setting for acquiring data of the MM service from broadcast waves,the LCT control is applied to the screen for the broadcasting program“before pressing of the MM key”. However, the MM service is notautomatically started, and display of the screen for the broadcastingprogram is also continued in the “region 0”. When the “pressing of theMM key (first time)” is carried out in this state, the MM service may bestarted and displayed in the “region 0” while maintaining the LCTcontrol. Further, when the “pressing of the MM key (second time)” iscarried out, the MM service in the “region 0” may be terminated toreturn to display of the screen for the broadcasting program whilemaintaining the LCT control. (Operation Example 21-17) Alternatively,the LCT control may be terminated while continuing display of the screenfor the MM service. Namely, display of the screen for the MM service maybe shifted from display of only the “region 0” under the LCT control todisplay thereof with a full screen. (Operation Example 21-18) Byexecuting such an operation, it becomes possible to further easilyswitch whether the MM service is to be started or terminated in responseto an instruction of the user while switching between validness andinvalidness of the LCT control.

Operation Examples 21-19 to 21

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM serviceand setting for acquiring data of the MM service from broadcast waves,the LCT control is applied to the screen for the broadcasting program“before pressing of the MM key”. However, the MM service is notautomatically started, and display of the screen for the broadcastingprogram is also continued in the “region 0”. When the “pressing of theMM key (first time)” is carried out in this state, the MM service may bestarted after the LCT control is terminated and it is shifted to displaythereof with a full screen. Further, when the “pressing of the MM key(second time)” is carried out, the LCT control may be executed againwhile continuing display of the screen for the MM service. In this case,the MM service may be shifted from display thereof with a full screen todisplay thereof in the “region 0”. (Operation Example 21-19)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, andthe LCT control may further be executed again. (Operation Example 21-20)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, anddisplay thereof with a full screen may be continued. (Operation Example21-21) By executing such an operation, it becomes possible to furthereasily switch whether the MM service is to be started or terminated inresponse to an instruction of the user while switching between validnessand invalidness of the LCT control.

Operation Example 21-22

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM serviceand setting for acquiring data of the MM service from a network, the LCTcontrol is applied to the screen for the broadcasting program “beforepressing of the MM key”. However, the MM service is not automaticallystarted, and display of the screen for the broadcasting program is alsocontinued in the “region 0”. When the “pressing of the MM key (firsttime)” is carried out in this state, the data of the MM service cannotbe acquired from the network, and thus, the message that pressing of theMM key is invalid (for example, “this key cannot be used currently” orthe like) may be displayed while the broadcasting program screen isbeing displayed. In this case, it becomes possible to inform the userthat the MM service cannot be started.

Operation Example 22

FIG. 44 to FIG. 47 show an operation of the broadcast receivingapparatus 100 at the time of pressing of the MM key 100R9 in a casewhere the broadcast receiving apparatus 100 receives a broadcastingprogram compliant with the MM service and uncompliant with the LCTcontrol in a state where the broadcast receiving apparatus 100 cannotcommunicate with each server apparatus on the Internet 200. Further, inthe broadcast receiving apparatus 100 according to the presentembodiment, an operation may also be differentiated under the conditionfurther depending upon whether a broadcasting program under reception isa program that contains setting for automatically starting the MMservice or not, or whether data of the MM service are acquired frombroadcast waves or acquired from a network. FIG. 44 is an example of acase where data of the MM service are acquired from broadcast waves bythe program that contains setting for automatically starting the MMservice. FIG. 45 is an example of a case where data of the MM serviceare acquired from a network by the program that contains setting forautomatically starting the MM service. FIG. 46 is an example of a casewhere data of the MM service are acquired from broadcast waves by theprogram that contains setting for preventing automatic start of the MMservice. FIG. 47 is an example of a case where data of the MM serviceare acquired from a network by the program that contains setting forpreventing automatic start of the MM service.

Operation Example 22-1

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from broadcast waves, theMM service is automatically started “before pressing of the MM key” anddisplayed with a full screen, and display of the screen for the MMservice is then continued. When the “pressing of the MM key (firsttime)” is carried out in this state, the MM service may be terminated toreturn to display of the screen for the broadcasting program. Further,when the “pressing of the MM key (second time)” is carried out, the MMservice may be started again and displayed while maintaining the displaywith a full screen. By executing such an operation, it becomes possibleto easily switch whether the MM service is to be started or terminatedin response to an instruction of the user.

Operation Example 22-2

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, settingfor acquiring data of the MM service from broadcast waves, and settingfor terminating display of the screen for the MM service that isautomatically started after a given time, then the MM service isautomatically started “before pressing of the MM key” and once displayedwith a full screen, and the screen for the MM service is switched to thenon-display state after a given time to return to the screen for thebroadcasting program. When the “pressing of the MM key (first time)” iscarried out in this state, the MM service may be started again anddisplayed while maintaining the display with a full screen. Further,when the “pressing of the MM key (second time)” is carried out, the MMservice may be terminated again to return to display of the screen forthe broadcasting program. By executing such an operation, it becomespossible to easily switch whether the MM service is to be started orterminated in response to an instruction of the user.

Operation Example 22-3

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andsetting for acquiring data of the MM service from a network, the data ofthe MM service cannot be acquired from the network, and thus, display ofthe screen for the broadcasting program is continued “before pressing ofthe MM key”. When the “pressing of the MM key (first time)” is carriedout in this state, the message that pressing of the MM key is invalid(for example, “this key cannot be used currently” or the like) may bedisplayed while the broadcasting program screen is being displayed. Inthis case, it becomes possible to inform the user that the MM servicecannot be started.

Operation Example 22-4

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM serviceand setting for acquiring data of the MM service from broadcast waves,the MM service is not automatically started “before pressing of the MMkey”, and display of the screen for the broadcasting program iscontinued. When the “pressing of the MM key (first time)” is carried outin this state, the MM service may be started and displayed whilemaintaining the display with a full screen. Further, when the “pressingof the MM key (second time)” is carried out, the MM service may beterminated to return to display of the screen for the broadcastingprogram. By executing such an operation, it becomes possible to easilyswitch whether the MM service is to be started or terminated in responseto an instruction of the user.

Operation Example 22-5

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM serviceand setting for acquiring data of the MM service from a network, the MMservice is not automatically started “before pressing of the MM key”,and display of the screen for the broadcasting program is continued.When the “pressing of the MM key (first time)” is carried out in thisstate, the data of the MM service cannot be acquired from the network,and thus, the message that pressing of the MM key is invalid (forexample, “this key cannot be used currently” or the like) may bedisplayed while the broadcasting program screen is being displayed. Inthis case, it becomes possible to inform the user that the MM servicecannot be started.

Operation Example 23

FIG. 48 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe MM service and compliant with the LCT control in a state where thebroadcast receiving apparatus 100 cannot communicate with each serverapparatus on the Internet 200.

Operation Example 23-1

In a case where the broadcasting program under reception is a programuncompliant with the MM service, display of the screen in a state wherethe LCT control is applied to the screen for the broadcasting program iscontinued “before pressing of the MM key”. When the “pressing of the MMkey (first time)” is carried out in this state, the message thatpressing of the MM key is invalid (for example, “this key cannot be usedcurrently” or the like) may be displayed in a state where the LCTcontrol is applied thereto while the broadcasting program screen isbeing displayed. In this case, it becomes possible to inform the userthat this is a program uncompliant with the MM service.

Operation Example 24

FIG. 49 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe MM service and the LCT control in a state where the broadcastreceiving apparatus 100 cannot communicate with each server apparatus onthe Internet 200.

Operation Example 24-1

In a case where the broadcasting program under reception is a programuncompliant with the MM service, display of the broadcasting programwith a full screen is continued “before pressing of the MM key”. Whenthe “pressing of the MM key (first time)” is carried out in this state,the message that pressing of the MM key is invalid (for example, “thiskey cannot be used currently” or the like) may be displayed whiledisplaying the broadcasting program screen with a full screen. In thiscase, it becomes possible to inform the user that this is a programuncompliant with the MM service.

Operation Example 25

FIG. 50 to FIG. 51 show an operation of the broadcast receivingapparatus 100 at the time of pressing of the MM key 100R9 in a casewhere the broadcast receiving apparatus 100 receives a broadcastingprogram compliant with the MM service and the LCT control in a statewhere the broadcast receiving apparatus 100 can communicate with eachserver apparatus on the Internet 200. Further, in the broadcastreceiving apparatus 100 according to the present embodiment, anoperation may also be differentiated under the condition furtherdepending upon whether a broadcasting program under reception is aprogram that contains setting for automatically starting the MM serviceor not. FIG. 50 is an example of a case where the broadcasting programis a program that contains setting for automatically starting the MMservice. FIG. 51 is an example of a case where the broadcasting programis a program that contains setting for preventing automatic start of theMM service.

Note that only any one of [Operation Example 25-1] to [Operation Example25-5] described below, only any one of [Operation Example 25-6] to[Operation Example 25-10] described below, only any one of [OperationExample 25-11] to [Operation Example 25-13] described below, and onlyany one of [Operation Example 25-16] to [Operation Example 25-20]described below may be selected and operated/controlled.

Operation Example 25-1

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, the MMservice is automatically started “before pressing of the MM key” anddisplayed in the “region 0” in a state where the LCT control is appliedto the screen for the broadcasting program, and display of the screenfor the MM service is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the MM service in the“region 0” may be terminated to return to display of the screen for thebroadcasting program while maintaining the LCT control. Further, whenthe “pressing of the MM key (second time)” is carried out, the MMservice may be started again in the “region 0” and displayed whilemaintaining the LCT control. By executing such an operation, it becomespossible to easily switch whether the MM service is to be started orterminated in response to an instruction of the user.

Operation Examples 25-2 to 4

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, the MMservice is automatically started “before pressing of the MM key” anddisplayed in the “region 0” in a state where the LCT control is appliedto the screen for the broadcasting program, and display of the screenfor the MM service is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the LCT control may beterminated while continuing display of the screen for the MM service.Namely, display of the screen for the MM service may be shifted fromdisplay of only the “region 0” under the LCT control to display thereofwith a full screen. Further, when the “pressing of the MM key (secondtime)” is carried out, the LCT control may be executed again whilecontinuing display of the screen for the MM service. In this case, theMM service may be shifted from display thereof with a full screen todisplay thereof in the “region 0”. (Operation Example 25-2)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, andthe LCT control may further be executed again. (Operation Example 25-3)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, anddisplay thereof with a full screen may be continued. (Operation Example25-4) By executing such an operation, it becomes possible to furthereasily switch whether the MM service is to be started or terminated inresponse to an instruction of the user while switching between validnessand invalidness of the LCT control.

Operation Example 25-5

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, the MMservice is automatically started “before pressing of the MM key” anddisplayed in the “region 0” in a state where the LCT control is appliedto the screen for the broadcasting program, and display of the screenfor the MM service is then continued. When the “pressing of the MM key(first time)” is carried out in this state, the message that pressing ofthe MM key is invalid (for example, “this key cannot be used currently”or the like) may be displayed. In this case, display of the screen forthe MM service in the “region 0” is continued until the broadcastreceiving apparatus 100 receives a command to instruct termination ofthe MM service from broadcast waves or until the user changes channels.Namely, the broadcast station side can control whether the MM service isto be started or terminated.

Operation Examples 25-6 to 7

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andfurther contains setting for terminating display of the screen for theMM service that is automatically started after a given time, then the MMservice is automatically started “before pressing of the MM key” andonce displayed in the “region 0” in a state where the LCT control isapplied to the screen for the broadcasting program, and the screen forthe MM service is switched to the non-display state after a given timeto return to the screen for the broadcasting program. When the “pressingof the MM key (first time)” is carried out in this state, the MM servicemay be started again in the “region 0” and displayed while maintainingthe LCT control. Further, when the “pressing of the MM key (secondtime)” is carried out, the MM service in the “region 0” may beterminated again to return to display of the screen for the broadcastingprogram while maintaining the LCT control. (Operation Example 25-6)Alternatively, the LCT control may be terminated while continuingdisplay of the screen for the MM service. Namely, display of the screenfor the MM service may be shifted from display of only the “region 0”under the LCT control to display thereof with a full screen. (OperationExample 25-7) By executing such an operation, it becomes possible tofurther easily switch whether the MM service is to be started orterminated in response to an instruction of the user while switchingbetween validness and invalidness of the LCT control.

Operation Examples 25-8 to 10

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andfurther contains setting for terminating display of the screen for theMM service that is automatically started after a given time, then the MMservice is automatically started “before pressing of the MM key” andonce displayed in the “region 0” in a state where the LCT control isapplied to the screen for the broadcasting program, and the screen forthe MM service is switched to the non-display state after a given timeto return to the screen for the broadcasting program. When the “pressingof the MM key (first time)” is carried out in this state, the MM servicemay be started again after the LCT control is terminated and it isshifted to display thereof with a full screen. Further, when the“pressing of the MM key (second time)” is carried out, the LCT controlmay be executed again while continuing display of the screen for the MMservice. In this case, the MM service may be shifted from displaythereof with a full screen to display thereof in the “region 0”.(Operation Example 25-8) Alternatively, display of the screen for the MMservice may be terminated to return to display of the broadcastingprogram screen, and the LCT control may further be executed again.(Operation Example 25-9) Alternatively, display of the screen for the MMservice may be terminated to return to display of the broadcastingprogram screen, and display thereof with a full screen may be continued.(Operation Example 25-10) By executing such an operation, it becomespossible to further easily switch whether the MM service is to bestarted or terminated in response to an instruction of the user whileswitching between validness and invalidness of the LCT control.

Operation Example 25-11

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, the LCTcontrol applied to the screen for the broadcasting program is terminated“before pressing of the MM key” and it is shifted to display thereofwith a full screen, and the MM service is further started and displayed.When the “pressing of the MM key (first time)” is carried out in thisstate, display of the screen for the MM service may be terminated toreturn to display of the broadcasting program screen, and displaythereof with a full screen may be continued. Further, when the “pressingof the MM key (second time)” is carried out, the MM service may bestarted again while continuing display thereof with a full screen. Byexecuting such an operation, it becomes possible to easily switchwhether the MM service is to be started or terminated in response to aninstruction of the user.

Operation Examples 25-12 to 13

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, the LCTcontrol applied to the screen for the broadcasting program is terminated“before pressing of the MM key” and it is shifted to display thereofwith a full screen, and the MM service is further started and displayed.When the “pressing of the MM key (first time)” is carried out in thisstate, display of the screen for the MM service may be terminated toreturn to display of the broadcasting program screen, and the LCTcontrol may further be executed again. Further, when the “pressing ofthe MM key (second time)” is carried out, the MM service may be startedagain in the “region 0” and displayed while maintaining the LCT control.(Operation Example 25-12)

Alternatively, the LCT control applied to the screen for thebroadcasting program may be terminated and it may be shifted to displaywith a full screen, and the MM service may further be started again anddisplayed. (Operation Example 25-13) By executing such an operation, itbecomes possible to easily switch whether the MM service is to bestarted or terminated in response to an instruction of the user.

Operation Example 25-14

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andfurther contains setting for terminating display of the screen for theMM service that is automatically started after a given time, the LCTcontrol applied to the screen for the broadcasting program is terminated“before pressing of the MM key” and it is shifted to display thereofwith a full screen; the MM service is further started and oncedisplayed; and the screen for the MM service is switched to thenon-display state after a given time to return to the screen for thebroadcasting program. At this time, the LCT control is being terminated.When the “pressing of the MM key (first time)” is carried out in thisstate, the MM service may be started again while continuing displaythereof with a full screen. Further, when the “pressing of the MM key(second time)” is carried out, the MM service may be terminated againwhile continuing display thereof with a full screen. By executing suchan operation, it becomes possible to easily switch whether the MMservice is to be started or terminated in response to an instruction ofthe user.

Operation Example 25-15

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andfurther contains setting for terminating display of the screen for theMM service that is automatically started after a given time, the LCTcontrol applied to the screen for the broadcasting program is terminated“before pressing of the MM key” and it is shifted to display thereofwith a full screen, the MM service is further started and oncedisplayed, and the screen for the MM service is switched to thenon-display state after a given time to return to the screen for thebroadcasting program. At this time, the LCT control is executed again.When the “pressing of the MM key (first time)” is carried out in thisstate, the MM service may be started again after the LCT control isterminated and it is shifted to display thereof with a full screen.Further, when the “pressing of the MM key (second time)” is carried out,display of the screen for the MM service may be terminated to return todisplay of the broadcasting program screen, and the LCT control mayfurther be executed again. By executing such an operation, it becomespossible to further easily switch whether the MM service is to bestarted or terminated in response to an instruction of the user whileswitching between validness and invalidness of the LCT control.

Operation Examples 25-16 to 17

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM service,the LCT control is applied to the screen for the broadcasting program“before pressing of the MM key”. However, the MM service is notautomatically started, and display of the screen for the broadcastingprogram is also continued in the “region 0”. When the “pressing of theMM key (first time)” is carried out in this state, the MM service may bestarted and displayed in the “region 0” while maintaining the LCTcontrol. Further, when the “pressing of the MM key (second time)” iscarried out, the MM service in the “region 0” may be terminated toreturn to display of the screen for the broadcasting program whilemaintaining the LCT control. (Operation Example 25-16) Alternatively,the LCT control may be terminated while continuing display of the screenfor the MM service. Namely, display of the screen for the MM service maybe shifted from display of only the “region 0” under the LCT control todisplay thereof with a full screen. (Operation Example 25-17) Byexecuting such an operation, it becomes possible to further easilyswitch whether the MM service is to be started or terminated in responseto an instruction of the user while switching between validness andinvalidness of the LCT control.

Operation Examples 25-18 to 20

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM service,the LCT control is applied to the screen for the broadcasting program“before pressing of the MM key”. However, the MM service is notautomatically started, and display of the screen for the broadcastingprogram is also continued in the “region 0”. When the “pressing of theMM key (first time)” is carried out in this state, the MM service may bestarted after the LCT control is terminated and it is shifted to displaythereof with a full screen. Further, when the “pressing of the MM key(second time)” is carried out, the LCT control may be executed againwhile continuing display of the screen for the MM service. In this case,the MM service may be shifted from display thereof with a full screen todisplay thereof in the “region 0”. (Operation Example 25-18)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, andthe LCT control may further be executed again. (Operation Example 25-19)Alternatively, display of the screen for the MM service may beterminated to return to display of the broadcasting program screen, anddisplay thereof with a full screen may be continued. (Operation Example25-20) By executing such an operation, it becomes possible to furthereasily switch whether the MM service is to be started or terminated inresponse to an instruction of the user while switching between validnessand invalidness of the LCT control.

Operation Example 26

FIG. 52 to FIG. 53 show an operation of the broadcast receivingapparatus 100 at the time of pressing of the MM key 100R9 in a casewhere the broadcast receiving apparatus 100 receives a broadcastingprogram compliant with the MM service and uncompliant with the LCTcontrol in a state where the broadcast receiving apparatus 100 cancommunicate with each server apparatus on the Internet 200. Further, inthe broadcast receiving apparatus 100 according to the presentembodiment, an operation may also be differentiated under the conditionfurther depending upon whether a broadcasting program under reception isa program that contains setting for automatically starting the MMservice or not. FIG. 52 is an example of a case where the broadcastingprogram is a program that contains setting for automatically startingthe MM service. FIG. 53 is an example of a case where the broadcastingprogram is a program that contains setting for preventing automaticstart of the MM service.

Operation Example 26-1

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service, the MMservice is automatically started “before pressing of the MM key” anddisplayed with a full screen and display of the screen for the MMservice is then continued. When the “pressing of the MM key (firsttime)” is carried out in this state, the MM service may be terminated toreturn to display of the screen for the broadcasting program. Further,when the “pressing of the MM key (second time)” is carried out, the MMservice may be started again and displayed while maintaining the displaywith a full screen. By executing such an operation, it becomes possibleto easily switch whether the MM service is to be started or terminatedin response to an instruction of the user.

Operation Example 26-2

In a case where the broadcasting program under reception is a programthat contains setting for automatically starting the MM service andfurther contains setting for terminating display of the screen for theMM service that is automatically started after a given time, the MMservice is automatically started “before pressing of the MM key” andonce displayed with a full screen, and the screen for the MM service isswitched to the non-display state after a given time to return to thescreen for the broadcasting program. When the “pressing of the MM key(first time)” is carried out in this state, the MM service may bestarted again and displayed while maintaining the display with a fullscreen. Further, when the “pressing of the MM key (second time)” iscarried out, the MM service may be terminated again to return to displayof the screen for the broadcasting program. By executing such anoperation, it becomes possible to easily switch whether the MM serviceis to be started or terminated in response to an instruction of theuser.

Operation Example 26-3

In a case where the broadcasting program under reception is a programthat contains setting for preventing automatic start of the MM service,the MM service is not automatically started “before pressing of the MMkey”, and display of the screen for the broadcasting program iscontinued. When the “pressing of the MM key (first time)” is carried outin this state, the MM service may be started and displayed whilemaintaining the display with a full screen. Further, when the “pressingof the MM key (second time)” is carried out, the MM service may beterminated to return to display of the screen for the broadcastingprogram. By executing such an operation, it becomes possible to easilyswitch whether the MM service is to be started or terminated in responseto an instruction of the user.

Operation Example 27

FIG. 54 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe MM service and compliant with the LCT control in a state where thebroadcast receiving apparatus 100 can communicate with each serverapparatus on the Internet 200.

Operation Example 27-1

In a case where the broadcasting program under reception is a programuncompliant with the MM service, display of the screen in a state wherethe LCT control is applied to the screen for the broadcasting program iscontinued “before pressing of the MM key”. When the “pressing of the MMkey (first time)” is carried out in this state, the message thatpressing of the MM key is invalid (for example, “this key cannot be usedcurrently” or the like) may be displayed in a state where the LCTcontrol is applied thereto while the broadcasting program screen isbeing displayed. In this case, it becomes possible to inform the userthat this is a program uncompliant with the MM service.

Operation Example 28

FIG. 55 shows an operation of the broadcast receiving apparatus 100 atthe time of pressing of the MM key 100R9 in a case where the broadcastreceiving apparatus 100 receives a broadcasting program uncompliant withthe MM service and the LCT control in a state where the broadcastreceiving apparatus 100 can communicate with each server apparatus onthe Internet 200.

Operation Example 28-1

In a case where the broadcasting program under reception is a programuncompliant with the MM service, display of the broadcasting programwith a full screen is continued “before pressing of the MM key”. Whenthe “pressing of the MM key (first time)” is carried out in this state,the message that pressing of the MM key is invalid (for example, “thiskey cannot be used currently” or the like) may be displayed whiledisplaying the broadcasting program screen with a full screen. In thiscase, it becomes possible to inform the user that this is a programuncompliant with the MM service.

As explained above, according to the broadcast receiving apparatus 100according to the present embodiment, even in a case where the broadcastreceiving apparatus 100 receives the 2K broadcasting by the MPEG2-TSmethod by means of only one multimedia key 100R9 on the remotecontroller 100R, or even in a case where the broadcast receivingapparatus 100 receives the 4K/8K broadcasting by the MMT method, it ispossible to suitably execute a control to switch between the programscreen for the broadcasting program and a display screen for any of themultimedia service, the Hybridcast service, and the data broadcastingservice regardless of whether the broadcast receiving apparatus 100 cancommunicate with each server apparatus on the Internet 200 or not.Therefore, it is possible to suitably realize various kinds of processeswithout unnecessarily increasing the number of keys on the remotecontroller 100R.

Further, in the above explanation of the present embodiment, the casewhere the broadcast receiving apparatus 100 includes both a function toreceive the 2K broadcasting by the MPEG2-TS method and a function toreceive the 4K/8K broadcasting by the MMT method has been described asan example. As a modification example of the present embodiment, thebroadcast receiving apparatus 100 may be configured so as to include thefunction to receive the 4K/8K broadcasting by the MMT method, but so asnot to include the function to receive the 2K broadcasting by theMPEG2-TS method. In such a case, the operation of each of the OperationExamples 21 to 28 described above is executed by the control of the maincontrol unit of the broadcast receiving apparatus 100. In this case, italso becomes possible to appropriately control both the MM service andthe LCT control via only the multimedia key 100R9 on the remotecontroller 100R.

As described above, the examples of the embodiments according to thepresent invention have been explained using the first to thirdembodiments. However, the configurations for achieving the technique ofthe present invention are not limited to those embodiments, and may bemodified in various ways. For example, some constituent elements of anembodiment may be replaced with those of another embodiment, and aconstituent element of an embodiment may be added to a constituentelement of another embodiment. These modifications are all within thescope of the present invention. In addition, numerical values, messages,and others in the specification and drawings are described by way ofexample, and the effects of the present invention are not impaired evenwhen values, messages, and others different from those are used.

A part or all of the functions and the like of the present inventiondescribed above may be achieved by means of hardware, for example, bydesigning such functions with integrated circuits. Alternatively, it maybe achieved by means of software by causing a microprocessor unit or thelike to interpret and execute operating programs for achievingrespective functions. It is also possible to use hardware and softwarein combination.

Note that the software that controls the broadcast receiving apparatus100 may be stored in advance in the ROM 103 and/or the storage(accumulation) unit 110 of the broadcast receiving apparatus 100 at thetime of product shipment. The software may be acquired from the otherapplication server 500 or the like on the Internet 200 through the LANcommunication unit 121 after the product shipment.

Alternatively, the software stored in a memory card, optical disc, orthe like may be acquired through the extension interface unit 124.

Further, control lines and data lines considered to be necessary for thedescription are shown in the drawings, and all the control lines anddata lines included in the product are not always shown in the drawings.Actually, it is presumable that almost all constituent elements areconnected with each other.

REFERENCE SINGS LIST

100, 800 . . . broadcast receiving apparatus, 100 a . . . antenna, 101,801 . . . main control unit, 102, 802 . . . system bus, 103, 803 . . .ROM, 104, 804 . . . RAM, 110, 810 . . . storage unit, 121, 821 . . . LANcommunication unit, 124, 824 . . . extension interface unit, 125, 825 .. . digital interface unit, 131, 831, 832 . . . tuner/demodulating unit,132 . . . separating unit, 141 . . . video decoder, 142 . . . videocolor gamut conversion unit, 143 . . . audio decoder, 144 . . . captiondecoder, 145 . . . subtitle decoder, 146 . . . subtitle synthesizingunit, 147 . . . subtitle color gamut conversion unit, 151 . . . datadecoder, 152 . . . cache unit, 153 . . . application control unit, 154 .. . browser unit, 155 . . . application color gamut conversion unit, 156. . . sound source unit, 161, 861 . . . video synthesizing unit, 162,862 . . . monitor unit, 163, 863 . . . video output unit, 164, 864 . . .audio synthesizing unit, 165, 865 . . . speaker unit, 166, 866 . . .audio output unit, 170, 870 . . . operation input unit, 841 . . . MMTdecode processing unit, 842 . . . MPEG2-TS decode processing unit, 200 .. . Internet, 200 r . . . router device, 200 a . . . access point, 300 t. . . radio tower, 300 s . . . broadcast satellite (or communicationsatellite), 300 . . . broadcast station server, 400 . . . serviceprovider server, 500 . . . other application server, 600 . . . mobilephone communication server, 600 b . . . base station, 700 . . . portableinformation terminal.

1. A broadcast receiving system comprising: a broadcast receivingapparatus configured to receive both broadcast data by an MPEG2transmission method and broadcast data by an MMT transmission method;and a remote controller configured to transmit control information tothe broadcast receiving apparatus to operate the broadcast receivingapparatus, wherein the broadcast receiving apparatus includes: a firstreceiver configured to receive the broadcast data by the MPEG2transmission method; a second receiver configured to receive broadcastdata by an MMT transmission method; a network communication transceiverconfigured to execute network communication; a first decoder configuredto decode the broadcast data received by the first receiver; a seconddecoder configured to decode the broadcast data received by the secondreceiver and data received by the network communication transceiver; adisplay configured to display video, the video being generated based onthe data decoded by the first decoder or the second decoder; a commandreceiver configured to receive the control information from the remotecontroller; and a controller configured to control the first receiver,the first decoder, the second receiver, the second decoder, the networkcommunication transceiver, the command receiver, and the display on abasis of the control information received by the command receiver,wherein the network communication transceiver is configured to receiveIP communication network data from an external network, the IPcommunication network data being linked with the broadcast data by theMPEG2 transmission method received by the first receiver, whereincontrol states by the controller includes: a first control in which acontrol to switch whether a display screen of the IP communicationnetwork data decoded by the first decoder is displayed on the display ornot is executed; and a second control in which a control to switchwhether a display screen for multimedia service of the MMT transmissionmethod decoded by the second decoder is displayed on the display or notis executed, wherein in the remote controller, a button to output firstcontrol information for the first control and a button to output secondcontrol information for the second control are constituted as a samebutton, wherein the controller is further configured to identify asetting related to automatic start of a display screen of the IPcommunication network data, and wherein the controller is furtherconfigured to, in response to pressing the same button, execute adifferent control in accordance with identified setting in a case wherethe display outputs video of a broadcasting program transmitted by theMPEG2 transmission method.